JP2001227705A - Combustion equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain combustion equipment in which evaporation is stabilized to stabilize combustion, and conversion of evaporation gas to tar is suppressed to prevent troubles from occurring due to tar, and prolong the service life of the equipment. SOLUTION: In the combustion equipment, evaporation chamber 46 is made nearly flat, the chamber 46 is equipped with two filters of the primary evaporation filter 47A and the secondary evaporation filter 47B, and a predetermined space 47C is provided between the two filters. The temperature around the fuel supply port is set close to the initial point or lower of distillation, and the temperature close to the nozzle 43 is set around the end point of distillation or higher than that. Thus this combustion equipment has a constitution divided thermally and mechanically in tow parts of the primary evaporation part and the secondary evaporation part.

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 the 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 into the cylindrical vaporizing section 4 maintained at a high temperature by the pump 3. Then, the supplied fuel is vaporized by a vaporization promoting material (not shown) such as a cylindrical ceramic porous 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. It is ejected from the nozzle 5 in the horizontal direction. The fuel ejected from the nozzle 5 is ejected into a mixing pipe 6 provided at a position downstream of the vaporizing section 4 while sucking primary air by an ejector effect, and is mixed there.
Is supplied to a line-shaped burner portion 7 integrated with the burner, and is burned there. The generated combustion gas is guided upward by a combustion tube 8 disposed so as to cover the periphery of the burner section 7, mixed with a room air flow from a blower 10 by a duct 9 covering the combustion tube 8, and heated. It is discharged as wind and used for heating. When the fuel supply amount is adjusted by changing the drive frequency or applied voltage of the pump 3, the primary air amount increases or decreases accordingly, and the combustion amount changes while the fuel-to-air ratio is kept constant. You can do it.

[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 formed in the porous portion of the vaporization promoting material that vaporizes the fuel, clogging and clogging causes poor vaporization, and poor vaporization causes poor combustion.

For example, when clogging occurs and poor vaporization progresses, it becomes difficult for fuel to enter the vaporizing section 4 and the amount of vaporization decreases, and the internal pressure of the vaporizing section 4 does not increase so much that 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, and the ejector effect by the ejection is weakened, the suction amount of the primary air is reduced, and the combustion state of the burner unit 7 is deteriorated. , Producing carbon monoxide and eventually misfiring.

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 fuel entering the vaporizing section 4, that is, the amount of vaporization decreases with respect to the supply power, and eventually becomes weak combustion, exceeding the combustion limit to generate odor or misfire.

Here, clogging and the likelihood of poor vaporization, which are the causes of the final failure state, are determined by temperature conditions such as temperature distribution applied to the vaporization promoting material, pore diameter and porosity of the vaporization promoting material, and the like. The vaporization is promoted when the temperature of the vaporization accelerating material is high, but when the amount of vaporization such as weak combustion is small, it is vaporized only at the inlet of the fuel and is easily clogged locally. Therefore, when the temperature of the vaporization accelerating material is lowered, when the vaporization amount such as the maximum strong combustion increases, the vaporization becomes insufficient due to the shortage of the heat amount, so that tar is easily generated or the fuel is ejected from the nozzle 5 as a liquid. Or
In the case where poor vaporization occurs, especially when the amount of vaporization such as maximum strong combustion increases and the temperature of the vaporization promoting material is likely to be deprived by the latent heat of vaporization, or when the amount of heat received by the combustion part such as weak combustion is small, etc. It is difficult to keep the temperature high. In other words, it is better to set the temperature of the vaporization promoting material so that the fuel inlet is low and the exit side is high in accordance with the amount of heat required for vaporization. Is preferably uniform.

Further, when the density of the vaporization promoting material is reduced by decreasing the pore diameter and decreasing the porosity, the supplied fuel is diffused throughout the vaporization promoting material by capillary action between the pores to promote vaporization, but tar is generated. In this case, the portion where tar accumulates is small, and clogging occurs immediately when tar is generated. Therefore, when the pore diameter of the vaporization promoting material is increased and the porosity is increased and the density is lowered, especially when the amount of vaporization such as maximum strong combustion increases, the supplied fuel may have insufficient passage resistance or the central part of the vaporization promoting material. The temperature is inevitably lowered, so that the gas is easily passed with insufficient vaporization, and the fuel is ejected from the nozzle 5 as a liquid, and poor vaporization occurs. That is,
The porosity or density needs to be set optimally according to the material / shape of the vaporization promoting material and the distribution of temperature given from the surroundings.

For this reason, various improvements have been made. For example, if the vaporization accelerating material is a metal net that is rounded, the central portion of the net or the overlap of the net with the net will increase even if the overall density is increased. When the mesh of the net is coarse, the mesh of the net becomes large and sparse, and the wire of the net becomes thick and thick, so that the center of the net becomes sparse. When the mesh size of the net is reduced, the strands of the net become thinner and thinner, and the overlap between the nets tends to be less sparse, and it is difficult to uniformly increase the density. For this reason, the fuel that has entered the vaporization section 4 is ejected from the nozzle 5 with insufficient vaporization, or tar is locally generated in the highly dense and dense portion of the vaporization promoting material, causing clogging, and poor combustion due to poor vaporization. Was likely to occur. In other words, if the vaporization promoting material is a rounded metal net, the temperature of the vaporization promoting material is high in thermal conductivity, so the temperature of the vaporization promoting material can be kept high up to the center, but the density is kept uniform throughout. It is difficult to achieve high density, especially.

In order to make the vaporization accelerating material more homogeneous, if the ceramic particles are made of a ceramic porous body formed by sintering or foaming, the density will be the size of the ceramic particles or the size of the foam. However, since the density is high and the porosity is low, the tar capacity is low, and the ceramic itself is not of good thermal conductivity, so the temperature at the center of the vaporization promoting material is low, Insufficient vaporization of the fuel flowing through the fuel cell causes poor vaporization and clogging. In other words, if a ceramic porous body is formed by sintering or foaming ceramic particles, it is easy to keep the density uniform, but the tar capacity is low and the temperature of the vaporization promoting material, especially the center It is difficult to keep the temperature of the section high, and it is difficult to sufficiently promote vaporization.

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 occurs due to poor vaporization or poor combustion due to clogging as described above. There has been a problem that poor vaporization caused by clogging of the vaporization promoting material due to tar generation affects the life of the equipment.

Further, in the above-described conventional combustion apparatus, since the burner portion 7 has a horizontally long line shape, the flame is hard to be uniform left and right, and the combustion at both ends tends to be disturbed by all means. Since it is blown right above, it is difficult to suppress the flow, and there is a problem that lift combustion is likely to occur. Further, there is also a problem that the burner 7 is easily deformed due to uneven temperature due to the line shape over time. Furthermore, since the mixing pipe 6 and the burner section 7 are provided separately from the vaporizing section 4, it is difficult to take a configuration in which the heat of the burner section 7 is recovered to the vaporizing section 6, and the burner section 7 is oblong. For this reason, there is also a problem that the dimensions of the device become horizontally long.

Conventionally, to solve such a problem, a combustion apparatus as shown in FIG. 16 has been proposed. That is, in this combustion device, a pump 12 is mounted on an upper surface of a tank 11, and one end of an oil feed pipe 13 is connected to the pump 12. The other end of the oil feed pipe 13 is connected to a circular evaporator 14, and the fuel sent from the tank 11 by the pump 12 is sent to an evaporator chamber 15 formed in the evaporator 14.

The vaporizing chamber 15 has a mixing tube 16 disposed at the center thereof, is formed in a donut shape so as to surround the mixing tube 16, and has a heater 17 embedded in the peripheral wall thereof. A communication path 19 communicating with the nozzle 18 is provided on the opposite side of the mixing pipe 16 with respect to the inlet of the oil supply pipe 13.

A return pipe 20 is attached to the nozzle 18, and an electromagnetic solenoid 21 is connected to the other end of the return pipe 20. Electromagnetic solenoid 2
The side opposite to the return pipe 20 is communicated with the tank 11, and the electromagnetic solenoid 21 is provided with a needle 22 for opening and closing the nozzle hole 23 of the nozzle 18.

A burner 24 is provided on the vaporizer 14 so as to cover the outlet of the mixing tube 16. The burner is formed by a combustion flame formed in a flame hole 25 formed in the peripheral wall of the burner 24. The flange 26 above the part 14 is configured to be heated.

In the above configuration, the vaporization chamber 15 is provided with the heater 1
The oil is heated to a predetermined temperature by 7, and is vaporized in the process of reaching the communication passage 19 from the oil supplied from the inlet of the oil supply pipe 13. The vaporized gas flows downward through the communication passage 19 below the vaporization chamber 15 and reaches the nozzle 18.

Here, when the vaporizing section 14 reaches a predetermined temperature, the needle 22 opens, and the vaporized gas flows into the nozzle hole 23.
Squirts more. The vaporized gas flows vigorously toward the mixing pipe 16 provided at the center of the vaporizing section 14, and accordingly, primary air is drawn in from between the lower end of the mixing pipe 16 and the nozzle 18, and from the outlet of the mixing pipe 16 to the inside of the burner section 24. , And ignited at the outer periphery of the burner section 24 to generate a combustion flame and perform combustion.

In the combustion apparatus having such a configuration, the mixing pipe 1
6, the mixed gas flows back and forth, and the mixed gas is uniformly ejected from a large number of flame holes 25 provided on the lower peripheral wall of the burner portion 24 and burned, so that the flame becomes uniform and the combustion flame is directed in the outer circumferential direction. However, the lift flame can be suppressed by a simple structure in which a burner ring 27 is provided on the outer periphery of the combustion flame so that the combustion flame flows upward. Then, the vaporizing section 14 has its upper flange 2
6 is heated by the combustion flame formed in the flame hole 25 formed in the peripheral wall of the burner part 24, and the vaporization part 14 is heated by heat conduction from the burner part 24, and the heater 17 is energized by the heat recovery action. Even without this, vaporization is continued and combustion is continued, that is, self-combustion is performed, and power saving is achieved.

However, the above conventional configuration has the following problems. That is, since the vaporizing section 14 is formed on the outer periphery of the mixing tube 16 so as to surround the same, the vaporizing section 14 itself becomes large, and it is difficult to make the vaporizing section 14 compact, and the heat capacity of the vaporizing section 14 increases. There is a problem that it takes time to heat the vaporizing unit 14 at the start of operation to a predetermined temperature, that is, there is a problem that the time until ignition becomes long.

Further, the vaporizing section 14 surrounding the mixing pipe 16
Is a donut-shaped disk, so that it is difficult to fill the vaporization chamber 15 with a vaporization promoting material for smoothing the fuel and suppressing the generation of tar, for example, and the selection of the vaporization promoting material is limited. Is done. Further, the temperature gradient in the vaporization chamber 15 cannot be provided, and the temperature near the inlet of the oil supply pipe 13 in the vaporization chamber 15 and the temperature on the nozzle 18 side are almost the same. When the pressure is increased, vaporization is performed near the inlet of the oil supply pipe 13 of the vaporization chamber 15, and tar is generated at that portion to prevent fuel from entering the vaporization chamber 15. In particular, in the case of weak combustion with a small latent heat of vaporization, the fuel supply power of the pump 39 is also small, so that the vaporization chamber 15
It easily accumulates in the vicinity of the inlet of the oil supply pipe 13 and synergistically deteriorates the tar characteristics. Therefore, when trying to lower the vaporization temperature, the temperature of the vaporized gas also decreases, and in the strong combustion that requires a large amount of latent heat of vaporization, the vaporization state becomes further insufficient and the combustion becomes unstable. There was a problem that it was not possible to sufficiently improve the controllability.

Further, since the nozzle 18 goes around and is separated from the lower surface side of the vaporizing section 14, the vaporizing section 14 and the nozzle 18
And the shape of the nozzle 1
8 and the nozzle 18 is located below the vaporization chamber 15, so that the high-temperature vaporized gas remains at the upper part of the vaporization chamber 15, and the low-temperature non-vaporized gas or oil flows into the lower part. The gas flows into the nozzle 18 through the passage 19, and the vaporized gas is difficult to flow, and the gas at a low temperature or the low temperature of the nozzle 18 makes it easy for the vaporized gas to tar from the communication passage 19 to the nozzle 18.
There was a problem that combustion was not stable.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to stabilize vaporization to stabilize combustion and to suppress tarification of vaporized gas to extend the life of tar.

[0024]

In order to achieve the above object, the present invention provides a vaporizing section having a vaporizing chamber for vaporizing fuel, a heater for heating the vaporizing section, and a gas vaporized in the vaporizing section. A nozzle for ejecting the gas; and a burner for burning the gas ejected from the nozzle. The vaporizing chamber has a substantially flat shape. A vaporizing filter is divided into two in the vaporizing chamber. A space having a predetermined gap is provided between the secondary vaporization filter and the primary vaporization filter on the side of the fuel supply port, and the temperature in the vicinity of the fuel supply port is set to the temperature near or below the initial fuel pool temperature, and the temperature in the vicinity of the nozzle. Is set to a temperature close to or higher than the end-point temperature of the fuel, and is mechanically and thermally divided into a primary vaporization section and a secondary vaporization section.

According to the above invention, the heat supplied to the vaporization chamber is transferred to the vaporization chamber on a wide heat transfer surface because the vaporization chamber has a substantially flat shape, and the distance between the upper and lower vaporization chamber wall surfaces and the central portion is reduced. The temperature difference is short and ideal heating can be performed.

Since the fuel entering through the fuel supply port has a substantially flat shape in the vaporization chamber, the fuel spreads in the lateral direction and is diffused, and is gradually vaporized in the process of reaching the nozzle while being vaporized. To go. At that time, since the temperature near the fuel supply port is set to a temperature close to or lower than the initial fuel pool point temperature, the fuel that has entered through the fuel supply port spreads a little further toward the fuel supply port and spreads out in the lateral direction. Since the vaporization starts from the part where the temperature has dropped, and the temperature near the nozzle is set to a temperature near or higher than the end-point temperature of the fuel,
The fuel is completely vaporized before the nozzle.

Further, the vaporizing filter is divided into two in the vaporizing chamber, and a space having a predetermined gap is provided between the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side. Therefore, the vaporizing filter on the fuel supply port side can be mechanically divided as a primary vaporizing section, and the vaporizing filter on the nozzle side can be mechanically divided as a secondary vaporizing section. The primary vaporizing section is mainly a vaporizing promoting section and a secondary vaporizing section. The vaporizing section further completely vaporizes the vaporized gas and functions as a tar collecting section for high-boiling components that do not vaporize, thereby sharing the functions and thereby stabilizing vaporization and stabilizing combustion.

Further, since the vaporization filter is divided, the material and the like of the vaporization filter on the nozzle side and the vaporization filter on the fuel supply port side can be changed.
The setting suitable for the function as the tar collecting section can be made.

Further, in the space between the vaporizing filters, a part of the large particles of the tar component generated without being vaporized by the vaporizing filter on the fuel supply port side collects, and the tar component is sent to the vaporizing filter on the nozzle side. Since the amount can be reduced, clogging of the vaporization filter on the nozzle side can be reduced.

That is, since the vaporization chamber has a substantially flat shape, the temperature difference between the wall surface and the central portion is small, and the temperature near the fuel supply port is set close to or below the temperature of the initial fuel storage point on the wide heat transfer surface. The temperature in the vicinity is defined as the temperature near or above the end point temperature of the fuel, so that the fuel can perform ideal vaporization transition, and is mechanically and thermally divided into a primary vaporization section and a secondary vaporization section. Therefore, stabilization of vaporization and stabilization of combustion are promoted, and fuel is vaporized only in the vicinity of the fuel supply port, causing local clogging or insufficient vaporization due to insufficient heat, making it easier to generate tar. Or the fuel is ejected from the nozzle as a liquid, and there is no fear of causing poor vaporization, the tarification of the vaporized gas can be suppressed and the storage capacity can be increased to extend the life of the tar. Direction It becomes possible way.

[0031]

DETAILED DESCRIPTION OF THE INVENTION According to the first aspect of the present invention, there is provided a vaporizing section having a vaporizing chamber for vaporizing a fuel, and a heater for heating the vaporizing section.
A vaporizer, a nozzle for ejecting gas vaporized in the vaporizing section, and a burner section for burning the gas ejected from the nozzle. The vaporizing chamber has a substantially flat shape, and two vaporizing filters are provided in the vaporizing chamber. And the nozzle side 2
A space having a predetermined gap is provided between the secondary vaporization filter and the primary vaporization filter on the side of the fuel supply port, and the temperature in the vicinity of the fuel supply port is set near or below the initial pool temperature of the fuel,
The temperature in the vicinity of the nozzle is set at a temperature close to or higher than the end-point temperature of the fuel, and is mechanically and thermally divided into a primary vaporization section and a secondary vaporization section.

The heat supplied to the vaporization chamber is transferred to the vaporization chamber on a wide heat transfer surface because the vaporization chamber has a substantially flat shape. And ideal heating can be performed.

That is, since the fuel entering from the fuel supply port has a substantially flat vaporizing chamber, the fuel spreads and spreads in the lateral direction, and is gradually vaporized in the process of reaching the nozzle while being promoted to be vaporized. To go. At that time, since the temperature near the fuel supply port is set to a temperature close to or lower than the initial fuel pool point temperature, the fuel that has entered through the fuel supply port spreads a little further toward the fuel supply port and spreads out in the lateral direction. Since the vaporization starts from the part where the temperature has dropped, and the temperature near the nozzle is set to a temperature near or higher than the end-point temperature of the fuel,
The fuel is completely vaporized before the nozzle.

Further, the vaporization filter is divided into two parts in the vaporization chamber, and a space is provided between the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side. The vaporizing filter on the supply port side can be mechanically divided as a primary vaporizing section, and the vaporizing filter on the nozzle side can be mechanically divided as a secondary vaporizing section. The primary vaporizing section is mainly a vaporization promoting section and the secondary vaporizing section is a vaporized gas. Is further vaporized completely, and as a tar collecting portion for a high-boiling component that does not vaporize, it is possible to stabilize vaporization and stabilize combustion by sharing functions.
In addition, since the vaporization filter is divided, it is possible to change the material of the vaporization filter on the nozzle side and the vaporization filter on the fuel supply port side, etc., so that it can be set to function as a vaporization promotion section and tar collection section. become. In addition, in the space between the vaporization filters, some of the large particles of tar that could not be vaporized by the vaporization filter on the fuel supply port side accumulate, reducing the amount of tar that is sent to the vaporization filter on the nozzle side. Therefore, clogging of the vaporization filter on the nozzle side can be reduced.

That is, since the vaporization chamber has a substantially flat shape, the temperature difference between the wall surface and the central portion is small, and a wide heat transfer surface is provided.
The temperature near the fuel supply port is near or below the initial storage temperature of the fuel, and the temperature near the nozzle is near or above the final storage point temperature of the fuel. Because it is mechanically and thermally divided into a primary vaporization section and a secondary vaporization section, it stabilizes vaporization to stabilize combustion, and vaporizes fuel only near the fuel supply port to locally clog. Or insufficient vaporization due to insufficient heat, making it easy to produce tar, and eliminating the risk of poor vaporization due to fuel jetting out of the nozzle as a liquid, suppressing the tarification of vaporized gas. In addition, the life of tar can be prolonged by increasing the capacity, and the tar performance can be improved.

Further, the invention of claim 2 is configured such that at least one of the primary vaporization filter and the secondary vaporization filter is made of a foamed metal having a porosity of 90% or more.

Then, the primary vaporization filter and 2
Since the porosity of at least one of the secondary vaporization filters is made of a foamed metal having a porosity of 90% or more, the porosity can be made uniform and dense, and the porosity can be increased. As a result, the temperature can be increased to the inside, and the vaporization area can be increased to promote the vaporization.

Further, the invention according to claim 3 is characterized in that at least one of the primary vaporization filter and the secondary vaporization filter is made of a foamed metal having a porosity of 90% or more.
The configuration is such that the outer periphery of the vaporizing filter is formed by pressing to the cross-sectional shape of the vaporizing chamber.

The porosity of at least one of the primary vaporization filter and the secondary vaporization filter is 90.
% Or more, and the outer periphery of the vaporization filter is formed by pressing the outer periphery of the vaporization filter into the cross-sectional shape of the vaporization chamber, so that the effect of claim 2 is obtained, and the outer periphery of the vaporization filter is the cross-sectional shape of the vaporization chamber. The temperature of the inner wall of the vaporization chamber can be easily reached to the center, and the vaporization can be further promoted.

In order to form the foam metal into a predetermined shape,
When a shearing process such as a punching press is performed, the end portion is compressed at an inclination of about 45 degrees, and the portion is clogged, so that there is a problem that the flow of fuel is hindered. In addition, since there is a concern that the structure of the end portion is weak and a cutting powder is generated due to the foamed shape, a problem may occur, but by pressing the strip of the foamed metal into the cross-sectional shape of the vaporization chamber, it is molded. The predetermined shape can be easily obtained.

The invention according to claim 4 is characterized in that at least one of the primary vaporization filter and the secondary vaporization filter is made of a foamed metal having a porosity of 90% or more.
The configuration is such that a metal-made vaporization holder having high thermal conductivity is disposed between the outer periphery of the vaporization filter and the inner surface of the vaporization chamber.

The porosity of at least one of the primary vaporization filter and the secondary vaporization filter is 90.
% Of foamed metal, and a highly heat-conductive metal vaporization holder is placed between the outer periphery of the vaporization filter and the inner surface of the vaporization chamber. To make the temperature of the inner wall of the vaporization chamber easily reach the center of the vaporization filter, and further promote the vaporization.

Further, the cross-sectional shape of the vaporization filter is structurally smaller than the cross-sectional shape of the vaporization chamber, and the space between the vaporization filters is widened, so that the tar storage capacity in the space is increased, and particularly, the secondary vaporization section is vaporized. 1 with vaporization holder from indoor wall
Since the step is separated, the step serves as a weir and dams fuel that is insufficiently vaporized.Furthermore, the vaporization is stabilized, and the vaporized gas ejected from the nozzle is stably ejected and the combustion is stabilized. Can be achieved.

According to a fifth aspect of the present invention, a heat receiving portion for receiving the heat of the burner portion is provided near the vaporizing portion, and a space between the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side is provided. , Arranged near the lower part of the heat receiving section.

A heat receiving portion for receiving heat of the burner portion is provided near the vaporizing portion, and a space between the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side is provided near the lower portion of the heat receiving portion. Since it is arranged, the heat of the heat receiving part is transferred by the radiation of the inner wall of the vaporization chamber, and the temperature of the space part can be increased, so that the primary vaporized gas passing through the space part is evaporated. It can be heated to a high temperature by the radiant heat from the wall without passing through the vaporization filter, and furthermore, the vaporization can be stabilized and the combustion can be stabilized.

The invention according to claim 6 is configured such that a space is provided near the fuel supply port of the primary vaporization filter on the fuel supply port side.

Then, the temperature in the vicinity of the fuel supply port is set to be close to or lower than the initial fuel pool temperature, and
Since a space is provided near the fuel supply port of the secondary vaporization filter, the fuel supplied to the vaporization chamber flows to the primary vaporization filter through the space near the fuel supply port and is vaporized there. There is no need to worry that fuel is vaporized only near the fuel supply port and locally clogged. In addition, impurities such as minute dust contained in the fuel are supplied and gradually accumulated, accumulate on the surface of the vaporization filter facing the fuel supply port, impeding the fuel from flowing into the vaporization chamber, and impairing the fuel supply. However, the presence of a space near the fuel supply port allows the aforementioned impurities to accumulate in that area, and further enlarges the surface of the vaporization filter facing the fuel supply port. Clogging can be prevented.

According to a seventh aspect of the present invention, the primary vaporizing filter and the secondary vaporizing filter are divided and disposed in the vaporizing chamber, and the cross-sectional shape of the insertion hole of the primary vaporizing filter on the side of the fuel supply port is provided. The cross-sectional shape of the insertion hole of the secondary vaporization filter on the nozzle side is configured so as to make a part or the whole smaller, and the length of the secondary vaporization filter is shorter than the length of the insertion hole of the secondary vaporization filter in the longitudinal direction. Then, the short part is configured to be a space for the secondary vaporization filter and the primary vaporization filter.

The primary vaporization filter and the secondary vaporization filter are divided into two parts and disposed in the vaporization chamber, and a part or the whole thereof is smaller than the sectional shape of the insertion hole of the primary vaporization filter on the fuel supply port side. In addition, the cross-sectional shape of the insertion hole of the secondary vaporization filter on the nozzle side is configured so that the length of the secondary vaporization filter is shorter than the longitudinal length of the insertion hole of the secondary vaporization filter.
The space between the primary vaporization filter and the primary vaporization filter is provided, so when the vaporization filter is divided and installed, the positioning of the primary vaporization filter and the secondary vaporization filter is not required, and the configuration is simple. Becomes Also,
The cross-sectional area of the secondary vaporization filter on the nozzle side becomes smaller than that of the other parts, the resistance when the vaporized gas of the fuel passes increases, and the supplied fuel is difficult to pass with insufficient vaporization. As a result, tar generation of defective fuel is easily performed on the fuel supply port side, and the vaporized gas reaching the nozzle does not include insufficiently vaporized fuel vaporized gas. And the combustion becomes stable. Furthermore, since the nozzle side of the vaporization chamber is a small hole, the heat transfer area is wider than other parts,
Further, since the distance to the center of the secondary vaporization filter also becomes shorter, the temperature at the center of the secondary vaporization filter becomes higher,
It becomes easier to collect tar as a secondary vaporization section.

Further, according to the invention of claim 8, the primary vaporizing filter and the secondary vaporizing filter are divided and disposed in the vaporizing chamber, and the secondary vaporizing filter on the nozzle side and the fuel vapor supply port side are disposed separately. The structure is such that a spacer is provided between the secondary vaporization filters.

The primary vaporizing filter and the secondary vaporizing filter are divided and disposed in the vaporizing chamber, and the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side are disposed separately.
Since the spacer is provided between the secondary vaporization filters, the effect of claim 1 is similarly obtained, the space becomes a spacer portion, the space shape is stabilized, and the primary vaporization filter on the side of the fuel supply port is connected to the primary vaporization filter by one. The secondary vaporizing section and the secondary vaporizing filter on the nozzle side can be structurally and strictly separated as the secondary vaporizing section, so that vaporization can be further stabilized and combustion can be stabilized.

According to a ninth aspect of the present invention, the spacer disposed between the primary vaporization filter and the secondary vaporization filter is configured as a metal net vaporization net disposed along the inner wall of the vaporization chamber. is there.

Since the vaporization net disposed between the primary vaporization filter and the secondary vaporization filter is made of a metal net disposed along the inner wall of the vaporization chamber, the effect of claim 8 can be obtained. When the non-vaporized fuel flows out of the primary vaporization filter on the side of the fuel supply port, the fuel flows along the vaporization chamber wall, is diffused by the vaporization net, and is promoted in vaporization. The vaporization of the fuel tends to cause film boiling and instability of vaporization such as pulse, but the film boiling can be suppressed by the vaporization net,
The vaporized gas ejected from the nozzle is ejected stably, and the combustion becomes stable.

According to a tenth aspect of the present invention, the spacer provided between the primary vaporization filter and the secondary vaporization filter has a higher density than the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side. This is a configuration using a low-evaporation diffusion filter.

The density of the vaporization diffusion filter disposed between the primary vaporization filter and the secondary vaporization filter is lower than that of the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side. Therefore, the effect of claim 9 can be obtained in the same manner, and the fuel supply port side 1
The secondary vaporizing filter is used as the primary vaporizing part, the secondary vaporizing filter on the nozzle side is used as the secondary vaporizing part, and the low-density vaporizing diffusion filter between them is used as the intermediate part where the vaporization promoting and collecting parts are mixed. Insufficiently vaporized fuel contained in the vaporized gas from the primary vaporization filter on the fuel supply port side can be collected and vaporized by the vaporization diffusion filter, and the fuel passing through the entire space can be diffused and vaporized. Be able to promote.

According to an eleventh aspect of the present invention, the spacer provided between the primary vaporization filter and the secondary vaporization filter is made of the same material as the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side. Thus, a vaporized diffusion filter having a small cross-sectional shape is provided, and a space is provided around the filter.

The vaporization diffusion filter disposed between the primary vaporization filter and the secondary vaporization filter is made of the same material as the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side, and has a small sectional shape. Since the space is provided around the periphery, the effect of claim 10 is similarly obtained, and since the sectional shape is reduced and the space is provided, the primary vaporization filter on the fuel supply port side is connected to the primary vaporization unit. In addition, the secondary vaporization filter on the nozzle side can be structurally divided as a secondary vaporization section, and when the non-vaporized fuel flows out of the primary vaporization filter on the fuel supply port side, the primary vaporization filter Most of the same material flows through the vaporization diffusion filter to the secondary vaporization filter on the nozzle side, and in the process, is further diffused by the vaporization diffusion filter to promote vaporization. It becomes so that. In addition, fuel that does not pass through the vaporization diffusion filter is accumulated in the space as a tar component such as defective kerosene having a low specific gravity and insufficient vaporization.As a result, the vaporization gas is further suppressed from being tarred and the storage amount is reduced. In many cases, the life of tar can be prolonged, and the tar performance can be improved.

In the twelfth aspect of the present invention, the spacer disposed between the primary vaporization filter and the secondary vaporization filter is configured as a thin metal-plate-like vaporization spacer having a corrugated and high heat conductivity.

The vaporizing spacer provided between the primary vaporizing filter and the secondary vaporizing filter is formed in a thin metal sheet having a corrugated heat conductivity.
In addition to the above effect, the vaporizing spacer becomes high in temperature due to the radiation of the inner wall of the vaporizing chamber, and the vaporized gas from the primary vaporizing filter comes into contact therewith, further increasing the temperature of the vaporized gas and promoting the vaporization of insufficiently vaporized gas. It is possible to suppress the formation of tar in the vaporized gas and increase the storage amount to extend the life of tar, thereby improving tar performance.

According to a thirteenth aspect of the present invention, the spacer provided between the primary vaporization filter and the secondary vaporization filter has the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side at both ends. It is configured as a thin metal plate-shaped vaporizing spacer which is placed and bent into a convex shape with a step in the space.

The vaporizing spacer disposed between the primary vaporizing filter and the secondary vaporizing filter has a secondary vaporizing filter on the nozzle side and a primary vaporizing filter on the fuel supply port side mounted on both ends. Since it is formed as a thin metal plate formed by bending into a convex shape provided with a stepped portion, the effects of claim 12 can be obtained, and the primary vaporizing filter and the secondary vaporizing filter are supplied to the vaporizing chamber during the production of the vaporizing portion. By simply inserting the mounted vaporizing spacer, the vaporizing filter can be inserted at the same time and the man-hour can be reduced. In addition, the vaporizing filter is protected by the vaporizing spacer, and the insertion accuracy such as the space dimension is improved.

According to a fourteenth aspect of the present invention, the spacer provided between the primary vaporization filter and the secondary vaporization filter has the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side at both ends. It is configured such that it is mounted, and a stepped portion is provided in the space portion, and the cross section is a convex shape, which is a vaporized spacer of a metal molded product having good heat conductivity.

The vaporizing spacer disposed between the primary vaporizing filter and the secondary vaporizing filter has a secondary vaporizing filter on the nozzle side and a primary vaporizing filter on the fuel supply port side mounted on both ends. Because the cross section with the step is provided as a metal molded product with good thermal conductivity with a convex shape,
The effect of claim 13 is obtained, and at the time of manufacturing the vaporizing section, the vaporizing filter can be inserted at the same time simply by inserting the vaporizing spacer on which the primary vaporizing filter and the secondary vaporizing filter are placed into the vaporizing chamber, and the number of steps can be reduced. The vaporizing filter is protected by the vaporizing spacer, and the insertion accuracy such as the space dimension is improved. Also, heat from the inner wall of the vaporizing chamber can be transferred to the vaporizing filter and the space via the vaporizing spacer, and even if a large amount of fuel is temporarily supplied and the temperature of the vaporizing filter is going to decrease, the heat capacity of the vaporizing spacer is large. The temperature change gradually changes by that amount, and during that time the temperature of the vaporization chamber is corrected by the feedback by receiving the heat of combustion,
The vaporization performance is stabilized.

The fifteenth aspect of the present invention is the second aspect of the present invention.
The secondary vaporization filter and the primary vaporization filter on the side of the fuel supply port are fixed to a thin fixing plate by fastening means.

Since the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side are fixed to the fixing plate by the fastening means, the effect of claim 8 can be obtained and the production of the vaporizing section can be achieved. Sometimes, it is only necessary to insert a fixing plate in which the primary vaporization filter and the secondary vaporization filter are fixed by the fastening means into the vaporization chamber, and the primary vaporization filter, the secondary vaporization filter and the thin plate are fixed by the fastening means. Therefore, there is no need to worry about the primary vaporization filter and the secondary vaporization filter coming off the fixing plate, and the assembling property is further improved.

Further, the invention of claim 16 is characterized in that the nozzle side 2
A structure in which a space is provided between the secondary vaporization filter and the primary vaporization filter on the side of the fuel supply port, and a secondary vaporization filter, a primary vaporization filter, and a thin plate diffusion filter are disposed on the upper surface, lower surface, or both surfaces of the space portion. There is.

A space is provided between the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side,
Since the secondary vaporizing filter, the primary vaporizing filter, and the thin plate-shaped diffusion filter are disposed on the upper surface, the lower surface, or both surfaces of the space portion thereof, the effect of claim 8 can be similarly obtained, and the fuel supply port side can be obtained. The part that is structurally divided as the primary vaporizing filter as the primary vaporizing part and the secondary vaporizing filter on the nozzle side as the secondary vaporizing part, and the part that promotes vaporization and diffusion with the diffusion filter that spreads throughout the vaporization chamber, are simultaneously formed. As a result, the promotion of vaporization is spread over the entire vaporization chamber, the tarification of the vaporized gas is suppressed, the storage amount is increased, the life for tar can be prolonged, and the tar performance can be improved.

Further, according to the seventeenth aspect of the present invention, the second nozzle on the nozzle side is provided.
A diffusion filter is disposed on the upper surface, lower surface, or both surfaces of the secondary vaporization filter and the primary vaporization filter on the side of the fuel supply port and the space therebetween, and the primary vaporization filter and the secondary vaporization filter are connected to the diffusion filter by fastening means. It has a fixed configuration.

A diffusion filter is provided on the upper side, lower side or both sides of the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side and the space between them, and the primary vaporization filter is provided on the diffusion filter. Since the secondary vaporizing filter is fixed by the fastening means, the assemblability of claim 15 is improved, and the effects of vaporization stability and combustion stability of claim 16 are simultaneously obtained.

[0070]

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

(Embodiment 1) FIG. 1 is a sectional view of a main part of a combustion apparatus according to a first embodiment of the present invention, FIG. 2 is a top view of a main part of the combustion apparatus, and FIG. 3 is a configuration diagram of a hot air heater.

First, the structure of a hot air heating apparatus using the combustion apparatus of the present invention will be described with reference to FIGS. 1, 2 and 3.
Reference numeral 1 denotes a main body case, which is provided with a tank 32 for holding liquid fuel on a lower side thereof and a detachable cartridge tank 33 above the tank 32. Numeral 34 designates a pump mounted on the upper surface of the tank 2, and from the upper end thereof, an oil feed pipe 3.
The fuel is supplied to the combustion device 36 via the fuel cell 5.

Reference numeral 37 denotes a combustion tube for guiding the combustion gas from the combustion device 36 upward, and a blower 38 for taking in and sending out the indoor air flow is disposed at the back of the combustion tube. Reference numeral 39 denotes a duct for mixing the combustion gas from the combustion tube 37 with the indoor air flow to generate hot air. A control unit 40 controls the combustion of the combustion device 36 and the blower 38, and controls the pump 34, the blower 38, and the like in a predetermined sequence based on an operation condition signal input from the operation unit. .

Next, the structure of the combustion device 36 will be described. Reference numeral 41 denotes a vaporizer, and a circular burner receiving seat 4 is provided on the upper portion thereof.
2, a nozzle 43 is disposed so as to be located substantially at the center of the burner receiving seat 42, and a primary air intake opening 44 for supplying combustion air between the burner receiving seat 42 and the nozzle 43 is provided. And a tip end portion of which is connected to a burner receiving seat 42 through a communication port 45 communicating with the nozzle 43.
A substantially flat vaporizing chamber 46 located in the vicinity is extended in the outer peripheral direction and integrally formed.

In the vaporizing chamber 46, a fuel supply port 48 for supplying fuel is provided at the end opposite to the nozzle 43, and the outer periphery of the vaporizing chamber is made of foamed metal having a porosity of 90% or more. The vaporization filter formed by pressing to have a cross-sectional shape of 2 is divided into two parts, a secondary vaporization filter 47B on the nozzle 43 side and a primary vaporization filter 47A on the fuel supply port 48 side, and the two are disposed. A space is provided near the fuel supply port.

A ring-shaped spacer 47C is provided between the primary vaporizing filter 47A and the secondary vaporizing filter 47B to provide a space 47D between the secondary vaporizing filter 47B and the primary vaporizing filter 47A, and to supply fuel. The temperature near the port 48 is near or below the initial storage point temperature of the fuel, and the temperature near the nozzle 43 is near or above the final storage point temperature of the fuel, and is mechanically provided to the primary vaporization section and the secondary vaporization section.
Thermally divided.

Further, a U-shaped heater 49 is arranged along approximately half the circumference on the lower surface side of the burner receiving seat 42 on the opposite side of the vaporizing chamber 46 of the vaporizing section 41. It is configured apart. The primary air intake opening 44 is hollowed out except for a rib portion 51 provided with a temperature detecting means 50 for detecting a temperature extending from the burner receiving seat 42 to the nozzle 43 mounting portion.
, A nozzle 43, a communication port 45, and a vaporization chamber 46 are arranged in a straight line.

The evaporating section 41 is provided with a convection blower 3.
It is configured to cool from the side of the fuel supply port 48 of the vaporization chamber 46 by the air flow from 8.

Reference numeral 52 denotes a bottomless cylindrical mixing tube placed on the burner receiving seat 42 so as to be located above the nozzle 43, and is formed in an upwardly tapered shape having a slightly larger upper portion.
The mixing tube 52 has a throat-shaped inlet portion, and faces the nozzle 43. The mixing tube 52 is configured to supply fuel gas ejected from the nozzle 43 and primary air sucked by an ejector effect caused by the ejection of the fuel gas. It is designed to be mixed.

Numeral 53 denotes a cantilevered cylindrical burner portion which is overlapped and covered on the burner receiving seat 42 from the upper opening side so as to cover the mixing tube 52, and is provided with a large number of flame holes 54 provided on the lower peripheral wall.
5 are formed.

Reference numeral 56 denotes an upwardly tapered burner ring attached to the burner receiving seat 42 so as to surround the outer peripheral portion of the flame hole 54. Reference numeral 57 denotes a heat receiving portion formed on the burner receiving seat 42, and the heat receiving portion 57 is provided on the nozzle side. Secondary vaporization filter 47B
And a primary vaporization filter 47A on the fuel supply port 48 side.

In the above configuration, the cartridge tank 3
The liquid fuel supplied to the tank 32 so as to maintain a constant oil level from 3 is pumped up from the tank 32 by the pump 34 and sent to the vaporization chamber 46 of the combustion device 36 via the oil supply pipe 35 and the fuel supply port 48. Can be The sent fuel is vaporized in a vaporization chamber 46 maintained at a predetermined temperature or higher by a heater 49 and becomes a high-pressure fuel gas, and is ejected from a nozzle 43. At this time, the primary air is sucked by an ejector effect and the vaporization chamber 46 is sucked. Are mixed in a mixing pipe 52 provided on the downstream side of the combustion chamber, supplied to a burner section 53, ejected from a flame hole 54, and
Burned at 5. Then, the generated combustion gas flows above the combustion tube 37, is mixed with the indoor air flow from the blower 38 in the duct 39, is discharged as warm air, and is used for heating. Then, the control unit 40 controls the heater 49, the pump 34, the blower 38, and the like in a predetermined sequence based on the conditions set by the operation unit to start the operation,
It controls operation such as stopping and varying the amount of combustion.

In the combustion in the combustion section 55, the fuel gas ejected from the nozzle 43 flows into the mixing pipe 52 provided on the downstream side of the vaporization chamber 46 while sucking the primary air by the ejector effect. Here, the mixture is discharged from the upper opening of the mixing pipe 52 into the burner 53, flows back around the outer periphery of the mixing pipe 52, and is ejected from a large number of flame holes 54 provided below the burner 53 and burns.

At this time, the mixed gas is turned back to the burner section 53 and flows around the mixing pipe 52, where diffusion mixing and uniform pressure are promoted, and the mixed gas is jetted out uniformly from the flame hole 54 to form a uniform flame. To form The flame formation direction is controlled to be upward by a burner ring 56 provided on the outer periphery of the flame, and stable combustion without lift is performed. In addition, the heat receiving section 5
7 is heated by the flame formed in the combustion section 55 of the burner section 53, and the vaporizing chamber 46 is heated by the heat recovery action from the flame.
Is maintained at a certain temperature or higher, and it becomes possible to reduce a part or all of the current supply to the heater 49.

Then, a communication port 45 communicating with the nozzle 43 is provided.
A substantially flat vaporizing chamber 46 for vaporizing the fuel whose distal end is located near the burner receiving seat 42 through the through hole extends from the burner receiving seat 42 in the outer peripheral direction and is integrally formed and disposed. Since the combustion heat of the portion 53 is transmitted to the vaporization chamber 46 through the burner receiving seat 42, the temperature on the fuel supply port 48 side of the vaporization chamber 46 is reduced by the temperature gradient generated by the conduction heat path, and the nozzle 43 The temperature in the vicinity can be increased, that is, the temperature in the vicinity of the fuel supply port 48 can be set to a temperature near or below the initial storage temperature of the fuel, and the temperature in the vicinity of the nozzle 43 can be set to a temperature near or higher than the end storage temperature of the fuel. Become like

The heat supplied to the vaporizing chamber 46 is transferred to the vaporizing chamber 46 on a wide heat transfer surface because the vaporizing chamber 46 has a substantially flat shape. The temperature difference is short, and ideal heating can be performed.

Since the fuel entering through the fuel supply port 48 has the vaporization chamber 46 having a substantially flat shape, the fuel spreads in the horizontal direction and is diffused, and gradually reaches the nozzle 43 while being vaporized. To evaporate. At this time, since the temperature near the fuel supply port 48 is set to a temperature close to or lower than the initial storage point temperature of the fuel, the fuel that has entered through the fuel supply port 48 moves slightly ahead of the fuel supply port 48 and also in the horizontal direction. Since the vaporization is started from the spread and diffused portion, and the temperature near the nozzle 43 is set to a temperature close to or higher than the end-point temperature of the fuel, the fuel is supplied to the nozzle 4.
The vaporization is completed before the position of 3.

Further, a vaporizing filter is provided in the vaporizing chamber 46.
The space 47D is provided between the secondary vaporization filter 47B on the nozzle 43 side and the primary vaporization filter 47A on the fuel supply port 48 side, so that the vaporization filter on the fuel supply port 48 side is provided. Can be mechanically divided into a primary vaporizing section and a vaporizing filter on the nozzle side as a secondary vaporizing section. The primary vaporizing section mainly vaporizes the vaporizing section, and the secondary vaporizing section vaporizes the vaporized gas more completely. In addition, by functioning as a tar collecting portion for high-boiling components that do not vaporize, vaporization can be stabilized and combustion can be stabilized by sharing functions. In addition, since the ring-shaped spacer 47C is disposed between the secondary vaporization filter 47B and the primary vaporization filter 47A, the space 47D becomes a spacer 47C, the shape of the space 47D is stabilized, and the primary vaporization filter 47A is The primary vaporizing section and the secondary vaporizing filter 47B can be structurally and strictly divided as a secondary vaporizing section, so that vaporization can be further stabilized and combustion can be stabilized. Further, in the space 47D formed by the spacers 47C between the vaporization filters, a part of the large particles of the tar content generated without being vaporized by the primary vaporization filter 47A accumulates, and the secondary vaporization filter 47B stores the tar component. Can be reduced, so that clogging of the secondary vaporization filter 47B on the nozzle 43 side can be reduced.

That is, since the vaporization chamber 46 has a substantially flat shape, the temperature difference between the wall surface and the central portion is small, and the temperature near the fuel supply port 48 on the wide heat transfer surface is reduced to a temperature close to or lower than the temperature of the initial fuel collection point. The temperature in the vicinity of the nozzle 43 is set to a temperature close to or higher than the end-point temperature of the fuel.
Since it is mechanically and thermally divided into the secondary vaporization section, it stabilizes vaporization to stabilize combustion and supplies fuel to the fuel supply port 4.
8 causes local clogging due to vaporization only in the vicinity of 8 or insufficient vaporization due to insufficient heat, making it easy to produce tar, or causing fuel to be ejected from the nozzle 43 as a liquid, resulting in poor vaporization. There is no fear of occurrence, and the tarification of the vaporized gas can be suppressed, and the storage amount can be increased to extend the life of the tar, and the tar performance can be improved.

Since both the primary vaporizing filter 47A and the secondary vaporizing filter 47B are made of a foamed metal having a porosity of 90% or more, the pores can be made uniform and dense, and the porosity is large. Further, since it is made of a metal material having good heat conductivity, the inside can be heated to a high temperature, the vaporization area can be increased to promote vaporization, and the primary vaporization filter 47A and the secondary vaporization filter 47B Both outer peripheries are compressed into the cross-sectional shape of the vaporizing chamber 46, the tissue becomes denser, and the heat conduction is improved, so that the temperature of the inner wall of the vaporizing chamber 46 can easily reach the center, and vaporization can be further promoted.

Further, when the foamed metal is subjected to a shearing process such as a punching press to form a predetermined shape, the end portion is compressed at an inclination of about 45 °, and the portion is clogged, so that the flow of fuel is obstructed. In addition, there is a concern that laser processing, etc., takes a long processing time and increases the cost, and because of the foamed shape, the structure of the end is weak and there is a concern that chips may be generated, but there is a concern that the foamed metal is crushed. The vaporization chamber 46
By pressing and molding to the cross-sectional shape described above, a predetermined shape can be easily obtained.

Since the space 47D between the secondary vaporization filter 47B on the nozzle 43 side and the primary vaporization filter 47A on the fuel supply port 48 side is disposed near the lower part of the heat receiving section, the heat of the heat receiving section is reduced. Is transmitted by the radiation of the inner wall of the vaporization chamber 46, and the temperature of the space 47D can be raised to a high temperature. Therefore, the primary vaporized gas passing through the space 47D is vaporized by the radiation heat from the inner wall of the vaporization chamber 46. Thus, the temperature can be raised to a high temperature without intervening, and further, the vaporization can be stabilized and the combustion can be stabilized.

Further, the temperature in the vicinity of the fuel supply port 48 is set to be equal to or less than the initial storage point temperature of the fuel, and a space 47D is provided in the vicinity of the fuel supply port 48 of the primary vaporization filter 47A on the fuel supply port 48 side. Therefore, the fuel supplied to the vaporization chamber 46 flows through the space 47D near the fuel supply port 48 to the primary vaporization filter 47A, where it is vaporized, and the fuel is vaporized only near the fuel supply port 48. This eliminates the risk of local clogging. In addition, impurities such as minute dust contained in the fuel are supplied and gradually accumulated, accumulate on the surface of the primary vaporization filter 47A facing the fuel supply port 48, and prevent the fuel from flowing into the vaporization chamber 46. However, the presence of the space 47D in the vicinity of the fuel supply port 48 allows the aforementioned impurities to accumulate in that portion.
Since the surface of the primary vaporization filter 47A facing 8 is also enlarged, local clogging of the fuel supply port 48 can be prevented.

(Embodiment 2) FIG. 4 is a detailed view of a main part of a combustion apparatus according to Embodiment 2 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus of the second embodiment, both the primary vaporizing filter 47A and the secondary vaporizing filter 47B are made of foamed metal having a porosity of 90% or more, and the primary vaporizing filter 47A and the secondary vaporizing filter 47B. And vaporization holders 61A and 61B made of metal having high thermal conductivity are disposed between the outer periphery and the inner surfaces of both vaporization chambers 46.

[0096] Both the primary vaporizing filter 47A and the secondary vaporizing filter 47B are made of foamed metal having a porosity of 90% or more.
7A, vaporizing holders 61A and 61B having high thermal conductivity between the outer periphery of the secondary vaporizing filter 47B and the inner surface of the vaporizing chamber 46.
, The vaporizing filters 47A and 2
Vaporization holder 61 with secondary vaporization filter 47B inserted
A and 61B can be pressed into the vaporization chamber 46 and brought into close contact with the inner wall thereof, and the temperature of the inner wall of the vaporization chamber 46 can easily reach the center of the primary vaporization filter 47A and the secondary vaporization filter 47B. Be able to promote.

The cross-sectional shape of the primary vaporizing filter 47A and the secondary vaporizing filter 47B is structurally smaller than the cross-sectional shape of the vaporizing chamber 46, so that the primary vaporizing filter 47A,
Since the space 47D between the secondary vaporization filters 47B is widened, the tar storage volume in the space 47D is increased, and
A secondary vaporizing section, that is, a secondary vaporizing filter 47B is provided in the vaporizing chamber 46.
Since the vaporization holder is separated from the inner wall by one step, the step serves as a weir and dams the insufficiently vaporized fuel, and the vaporization is stabilized and the vaporized gas ejected from the nozzle 43 is stabilized. Then, the fuel is ejected to stabilize the combustion.

(Embodiment 3) FIG. 5 is a detailed view of a main part of a combustion apparatus according to Embodiment 3 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus of the third embodiment, the primary vaporizing filter 47A and the secondary vaporizing filter 4
7B and the fuel supply port 4
The 2nd side of the nozzle 43 is set so that a part or the whole is smaller than the sectional shape of the insertion hole of the primary vaporization filter 47A on the 8th side.
The cross-sectional shape of the insertion hole of the secondary vaporization filter 47B is formed, and the length L2 of the secondary vaporization filter 47B is longer than the length L1 of the insertion hole of the secondary vaporization filter 47B.
Is shortened, and the shorter portion is used as the secondary vaporization filter 47B and 1
The configuration is such that it is a space 47D of the secondary vaporization filter 47A.

The primary vaporizing filter 47A and the secondary vaporizing filter 47B are divided and disposed in the vaporizing chamber 46. The primary vaporizing filter 47A on the side of the fuel supply port 48 has a cross-sectional shape of the insertion hole. The cross-sectional shape of the insertion hole of the secondary vaporization filter 47B on the nozzle 43 side is configured so as to partially or entirely reduce the size, and the secondary vaporization filter 47B is longer than the longitudinal length L1 of the insertion hole of the secondary vaporization filter 47B. The length L2 of the first and second vaporization filters 47B and 47A is made to be a space 47D between the secondary vaporization filter 47B and the primary vaporization filter 47A.
, The positioning of the primary vaporizing filter 47A and the secondary vaporizing filter 47B is not required, and the configuration is simplified. Also, the cross-sectional area of the secondary vaporizing filter 47B on the nozzle 43 side becomes smaller than other parts, the resistance when the vaporized gas of the fuel passes increases, and the supplied fuel passes with insufficient vaporization. It becomes difficult. As a result, tar generation of defective fuel is
8, the vaporized gas arriving at the nozzle 43 does not include insufficiently vaporized fuel vaporized gas, so that the vaporized gas discharged from the nozzle 43 is stably discharged and combustion is stabilized. Become like Furthermore, since the nozzle 43 side of the vaporization chamber 46 is formed as a small hole, the heat transfer area is larger than other portions, and the distance to the center of the secondary vaporization filter 47B is also shorter. , And the tar is easily collected as a secondary vaporization part.

(Embodiment 4) FIG. 6 is a detailed view of a main part of a combustion apparatus according to Embodiment 4 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus according to the fourth embodiment, a spacer disposed between the primary vaporization filter 47A and the secondary vaporization filter 47B is connected to a vaporization net 62 made of a metal net and disposed along the inner wall of the vaporization chamber 46. There is a configuration.

The vaporizing net 62 disposed between the primary vaporizing filter 47A and the secondary vaporizing filter 47B is made of a metal net disposed along the inner wall of the vaporizing chamber 46. The effect is obtained, and when the fuel that has not been vaporized flows out from the primary vaporization filter 47A on the side of the fuel supply port 48, the fuel flows along the inner wall of the vaporization chamber 46, is diffused by the vaporization net 62, and the vaporization is promoted. Further, the vaporization of the fuel in the space 47D where the temperature becomes high causes film boiling, which tends to cause vaporization instability such as a pulse. However, the film boiling can be suppressed by the vaporization net 62, and the fuel is ejected from the nozzle 43. The vaporized gas is ejected stably and the combustion becomes stable.

(Embodiment 5) FIG. 7 is a detailed view of a main part of a combustion apparatus according to Embodiment 5 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus of the fifth embodiment, the spacer provided between the primary vaporization filter 47A and the secondary vaporization filter 47B is provided with a spacer provided on the nozzle 43 side.
B and the primary vaporization filter 47A on the fuel supply port 48 side
The configuration uses a vaporization diffusion filter 63 having a lower density.

Then, the vaporization diffusion filter 63 disposed between the primary vaporization filter 47A and the secondary vaporization filter 47B is connected to the secondary vaporization filter 47B on the nozzle 43 side and the primary vaporization filter 4 on the fuel supply port 48 side.
Since the density is lower than that of 7A, the vaporization promoting effect of the fourth embodiment can be obtained similarly, the primary vaporization filter 47A on the fuel supply port 48 side is used as the primary vaporization section, and the secondary vaporization on the nozzle 43 side is used. The vaporizing filter 47B is a secondary vaporizing section,
Further, the vaporization diffusion filter 3 having a low density therebetween is structurally divided as an intermediate portion in which the vaporization promotion and trapping portions are mixed, and insufficient vaporization contained in the vaporized gas from the primary vaporization filter 47A on the fuel supply port 48 side. The fuel can be collected by the vaporization diffusion filter 63 to promote vaporization.
The fuel passing through the entire area of the portion D can be diffused to promote the vaporization.

(Embodiment 6) FIG. 8 is a detailed view of a main part of a combustion apparatus according to Embodiment 6 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus of the sixth embodiment, a spacer provided between the primary vaporization filter 47A and the secondary vaporization filter 47B is provided with a secondary vaporization filter 47 on the nozzle 43 side.
B and the primary vaporizing filter 47A on the fuel supply port 48 side are made of the same material as the vaporizing diffusion filter 64 having a reduced cross-sectional shape, and a space 64A is provided around the vaporizing diffusion filter 64.

Then, the vaporization diffusion filter 64 disposed between the primary vaporization filter 47A and the secondary vaporization filter 47B is connected to the secondary vaporization filter 47B on the nozzle 43 side and the primary vaporization filter 47A on the fuel supply port 48 side.
The same material as above, with a small cross-sectional shape, and a space 64A around it
Is provided, the effect of the fifth embodiment is obtained in the same manner, the cross-sectional shape is reduced, and there is a space 64A, so that the primary vaporizing filter 47A on the fuel supply port 48 side is used as the primary vaporizing section, The secondary vaporization filter 47B on the 43 side is
When the unvaporized fuel flows out of the primary vaporization filter 47A on the fuel supply port 48 side, most of the vaporization is performed because the material is the same as that of the primary vaporization filter 47A. The gas flows through the diffusion filter 64 to the secondary vaporization filter 47B on the nozzle 43 side, and in the process, is further diffused by the vaporization diffusion filter 64 so that vaporization is promoted. In addition, the fuel that does not pass through the vaporization diffusion filter 64 is accumulated in the space 64A as a tar component such as a bad kerosene having a specific gravity that is insufficiently vaporized, and as a result, the gasification of the vaporized gas is further suppressed and the amount stored is reduced. , The life of the tar can be extended, and the tar performance can be improved.

(Embodiment 7) FIG. 9 is a detailed view of a main part of a combustion apparatus according to Embodiment 7 of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

The combustion apparatus of the seventh embodiment has a configuration in which the spacer provided between the primary vaporization filter 47A and the secondary vaporization filter 47B is a thin metal-plate-like vaporization spacer 65 having a corrugated heat conductivity. .

Since the vaporizing spacer provided between the primary vaporizing filter 47A and the secondary vaporizing filter 47B is a thin metal plate having a corrugated heat conductivity, the effect of the spacer of the first embodiment can be obtained. At the same time, the vaporizing spacer 65 is heated to high temperature by the radiation of the inner wall of the vaporizing chamber 46, and the vaporized gas from the primary vaporizing filter 47A comes into contact with the vaporized spacer 65 to further raise the temperature of the vaporized gas and promote the vaporization of the insufficiently vaporized gas. In addition, it is possible to suppress the conversion of the vaporized gas into tar and increase the capacity of the vaporized gas to extend the life of tar, thereby improving the tar performance.

(Eighth Embodiment) FIG. 10 is a detailed view of a main part of a combustion apparatus according to an eighth embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus according to the eighth embodiment, a spacer provided between the primary vaporizing filter 47A and the secondary vaporizing filter 47B is provided with a secondary vaporizing filter 47 on the nozzle 43 side.
B and a primary vaporizing filter 47A on the side of the fuel supply port 48 are mounted on both ends, and the vaporizing spacer 66 in the form of a thin metal plate is formed by bending into a convex shape having a step in the space 47D.

Then, the vaporizing spacer 66 disposed between the primary vaporizing filter 47A and the secondary vaporizing filter 47B is attached to the secondary vaporizing filter 47B on the nozzle 43 side.
And a primary vaporizing filter 47A on the side of the fuel supply port 48 are mounted on both ends, and the vaporizing spacer 66 is formed by bending into a convex shape having a step in the space 47D. And a primary vaporizing filter 47A at both ends to the vaporizing chamber 46 during the production of the vaporizing section.
By simply inserting the vaporizing spacer 66 on which the secondary vaporizing filter 47B is placed, the primary vaporizing filters 47A,
The secondary vaporizing filter 47B can be inserted at the same time to save man-hours, and the primary vaporizing filter 4
7A, the secondary vaporizing filter 47B is protected, and the space 47 is protected.
The insertion accuracy such as the dimension of D is also improved.

Ninth Embodiment FIG. 11 is a detailed view of a main part of a combustion apparatus according to a ninth embodiment of the present invention. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus of the ninth embodiment, a spacer provided between the primary vaporization filter 47A and the secondary vaporization filter 47B is provided with a secondary vaporization filter 47 on the nozzle 43 side.
B and a primary vaporizing filter 47A on the side of the fuel supply port 48 are placed at both ends, and a stepped portion is provided in a space 47D.
The configuration is as follows.

Then, the vaporizing spacer 67 disposed between the primary vaporizing filter 47A and the secondary vaporizing filter 47B is attached to the secondary vaporizing filter 47B on the nozzle 43 side.
And a primary vaporization filter 47A on the side of the fuel supply port 48 is mounted on both ends, and a stepped portion is provided in the space 47D. The effect of the spacer is obtained, and only the primary vaporizing filter 47A and the secondary vaporizing filter 47A, on which the primary vaporizing filter 47A and the secondary vaporizing filter 47B are placed, are inserted into the vaporizing chamber 46 when the vaporizing section is manufactured. The filter 47B can be inserted at the same time, so that the man-hour can be saved, and the primary vaporizing filter 47A and the secondary vaporizing filter 47B are protected by the vaporizing spacer 67, and the insertion accuracy such as the dimension of the space 47D is improved. Further, heat from the inner wall of the vaporizing chamber 46 is transferred to the primary vaporizing filter 47 via the vaporized spacer metal molding 67.
A, heat can be transferred to the secondary vaporizing filter 47B and the space 47D, and even if a large amount of fuel is temporarily supplied to lower the temperatures of the primary vaporizing filter 47A and the secondary vaporizing filter 47B, the heat capacity of the vaporizing spacer 67 can be reduced. Is large, the temperature change gradually changes, and during that time, the temperature of the vaporization chamber 46 is corrected by the feedback of the heat received by the combustion heat, so that the vaporization performance is stabilized.

(Embodiment 10) FIG. 12 shows Embodiment 1 of the present invention.
FIG. 2 is a detailed view of a main part of the combustion apparatus No. 0. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus according to the tenth embodiment, the secondary vaporizing filter 47B on the nozzle 43 side and the primary vaporizing filter 47A on the fuel supply port 48 side are fastened to a thin fixed plate 68 by fastening means 6
9 is fixed.

Since the secondary vaporizing filter 47B on the nozzle 43 side and the primary vaporizing filter 47A on the fuel supply port 48 side are fixed to the thin plate 68 by the fastening means 69, the spacer of the first embodiment is used. The effect is obtained,
When the vaporizing section is manufactured, the primary vaporizing filter 4 is supplied to the vaporizing chamber 46.
It is only necessary to insert the fixing plate 68 in which the 7A and the secondary vaporizing filter 47B are fixed by the fastening means 69, and the primary vaporizing filter 47A, the secondary vaporizing filter 47B and the fixing plate 6
Since 8 is fixed by the fastening means 69, there is no fear that the primary vaporizing filter 47A and the secondary vaporizing filter 47B come off the fixing plate 68, and the assembling property is further improved.

(Embodiment 11) FIG. 13 shows Embodiment 1 of the present invention.
FIG. 2 is a detailed view of a main part of the first combustion device. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

In the combustion apparatus according to the eleventh embodiment, a space 47D is provided between the secondary vaporization filter 47B on the nozzle 43 side and the primary vaporization filter 47A on the fuel supply port 48 side. The thin plate-shaped diffusion filter 70 is provided on the lower surface of the space 47D and the space 47D.

A space 47D is provided between the secondary vaporizing filter 47B on the nozzle 43 side and the primary vaporizing filter 47A on the fuel supply port 48 side.
7B and primary vaporizing filter 47A and its space 47D
Since the thin plate-shaped diffusion filter 70 is disposed on the lower surface of the portion, the effect of the spacer of the first embodiment can be obtained similarly, and the primary vaporizing filter 47A on the fuel supply port 48 side is used as a primary vaporizing portion. In addition, a part where the secondary vaporization filter 47B on the nozzle 43 side is structurally divided as a secondary vaporization part and a part which promotes vaporization and diffusion by the diffusion filter 70 which spreads over the entire vaporization chamber 46 are obtained at the same time, and the promotion of vaporization is achieved. The gas spreads over the entire area of the chamber 46, the tarification of the vaporized gas is suppressed, and the storage amount is increased, so that the life of the tar can be extended, and the tar performance can be improved.

(Embodiment 12) FIG. 14 shows Embodiment 1 of the present invention.
It is a principal part detailed view in 2 combustion apparatuses. The same parts as those in the first embodiment are denoted by the same reference numerals and description thereof is omitted.

The combustion apparatus according to the twelfth embodiment has the nozzle 43
Secondary vaporization filter 47B on the side and 1 on the side of the fuel supply port 48.
A diffusion filter 71 is provided on the lower surface of the secondary vaporization filter 47A and the space 47D therebetween, and the secondary vaporization filter 47B and the primary vaporization filter 47A are fixed to the diffusion filter 71 by fastening means 72.

A diffusion filter 71 is disposed on the upper surface, lower surface, or both surfaces of the primary vaporizing filter 47A on the nozzle 43 side and the fuel supply port 48 side and the space 47D therebetween. Vaporizing filter 47B and primary vaporizing filter 47A
Are fixed by the fastening means 72, so that the assemblability of the tenth embodiment can be improved, and the effects of stable vaporization and stable combustion of the eleventh embodiment can be simultaneously obtained.

In the above embodiment, both the secondary vaporizing filter 47B and the primary vaporizing filter 47A are made of foamed metal having a porosity of 90% or more, but either one or both are made of another material. A vaporizing filter may be used, and the configuration of each component may be any configuration as long as the object of the present invention is achieved.

[0129]

As described above, according to the first aspect of the present invention, the heat supplied to the vaporization chamber is transferred to the vaporization chamber on a wide heat transfer surface because the vaporization chamber has a substantially flat shape. The distance between the upper and lower vaporization chamber walls and the center is short, and the temperature difference is small, so that ideal heating can be performed.

[0130] Since the fuel entering through the fuel supply port has a substantially flat vaporizing chamber, the fuel spreads in the lateral direction and is diffused, and is gradually vaporized in the process of reaching the nozzle while being vaporized. To go. At that time, since the temperature near the fuel supply port is set to a temperature close to or lower than the initial fuel pool point temperature, the fuel that has entered through the fuel supply port spreads a little further toward the fuel supply port and spreads out in the lateral direction. Since the vaporization starts from the part where the temperature has dropped, and the temperature near the nozzle is set to a temperature near or higher than the end-point temperature of the fuel,
The fuel is completely vaporized before the nozzle.

Further, the vaporization filter is divided into two in the vaporization chamber, and a space is provided between the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side. The vaporizing filter on the supply port side can be mechanically divided as a primary vaporizing section, and the vaporizing filter on the nozzle side can be mechanically divided as a secondary vaporizing section. The primary vaporizing section is mainly a vaporization promoting section and the secondary vaporizing section is a vaporized gas. Is further vaporized completely, and as a tar collecting portion for a high-boiling component that does not vaporize, it is possible to stabilize vaporization and stabilize combustion by sharing functions.
In addition, since the vaporization filter is divided, it is possible to change the material of the vaporization filter on the nozzle side and the vaporization filter on the fuel supply port side, etc., so that it can be set to function as a vaporization promotion section and tar collection section. become. In addition, in the space between the vaporization filters, some of the large particles of tar that could not be vaporized by the vaporization filter on the fuel supply port side accumulate, reducing the amount of tar that is sent to the vaporization filter on the nozzle side. Therefore, clogging of the vaporization filter on the nozzle side can be reduced.

That is, since the vaporization chamber has a substantially flat shape, the temperature difference between the wall surface and the central portion is small, and a wide heat transfer surface is provided.
The temperature near the fuel supply port is near or below the initial storage temperature of the fuel, and the temperature near the nozzle is near or above the final storage point temperature of the fuel. Because it is mechanically and thermally divided into a primary vaporization section and a secondary vaporization section, it stabilizes vaporization to stabilize combustion, and vaporizes fuel only near the fuel supply port to locally clog. Or insufficient vaporization due to insufficient heat, making it easy to produce tar, and eliminating the risk of poor vaporization due to fuel jetting out of the nozzle as a liquid, suppressing the tarification of vaporized gas. In addition, the life of tar can be prolonged by increasing the capacity, and the tar performance can be improved.

Further, according to the second aspect of the present invention, since the porosity of at least one of the primary vaporization filter and the secondary vaporization filter is made of a foamed metal having a porosity of 90% or more, the pores are uniform and dense. In addition, the porosity can be increased, and a metal material having good heat conductivity can be used. Therefore, the temperature can be increased to the inside, and the vaporization area can be increased to promote vaporization.

According to the third aspect of the invention, at least one of the primary vaporizing filter and the secondary vaporizing filter is made of a foamed metal having a porosity of 90% or more, and the outer periphery of the vaporizing filter is formed in a vaporizing chamber. The cross-sectional shape of the vaporization filter is pressed and molded, so that the effect of claim 2 is obtained, and the outer periphery of the vaporization filter is compressed into the cross-sectional shape of the vaporization chamber, the tissue becomes dense, and the heat conduction is improved, and the vaporization chamber is improved. The temperature of the wall can be easily reached to the center, and vaporization can be further promoted.

Further, in order to form the foam metal into a predetermined shape,
When a shearing process such as a punching press is performed, the end portion is compressed at an inclination of about 45 degrees, and the portion is clogged, so that there is a problem that the flow of fuel is hindered. In addition, because of the foamed shape, the end structure is weak and there is a concern that chips may occur, which may cause problems.However, it is easy to press the metal foam into the cross-sectional shape of the vaporization chamber and mold it. To a predetermined shape.

According to the invention of claim 4, at least one of the primary vaporizing filter and the secondary vaporizing filter is made of foamed metal having a porosity of 90% or more, and the outer periphery of the vaporizing filter and the vaporizing chamber are formed. Since a metal vaporization holder with high thermal conductivity is arranged between the inner surfaces of
The vaporization holder in which the vaporization filter is inserted can be pressed into the vaporization chamber and brought into close contact with the inner wall thereof, so that the temperature of the vaporization chamber wall can easily reach the center of the vaporization filter, thereby further promoting vaporization.

Further, since the cross-sectional shape of the vaporizing filter is structurally smaller than the cross-sectional shape of the vaporizing chamber, and the space between the vaporizing filters is widened, the tar storage volume in the space increases, and the secondary vaporizing section is formed. The vaporization holder is separated from the inner wall of the vaporization chamber by one step, so that the step serves as a weir and dams the insufficiently vaporized fuel. Further, the vaporization gas is stably vaporized. The fuel is jetted stably to stabilize combustion.

According to the fifth aspect of the present invention, a heat receiving portion for receiving the heat of the burner portion is provided near the vaporizing portion.
The secondary vaporization filter on the nozzle side and the fuel supply port side 1
Since the space between the secondary vaporization filters is arranged near the lower part of the heat receiving part, the heat of the heat receiving part is transferred by the radiation of the inner wall of the vaporization chamber, and the temperature of the space part can be increased.
The primary vaporized gas passing through the space can be heated to a high temperature by radiant heat from the vaporization chamber wall without passing through the vaporization filter, and furthermore, the vaporization can be stabilized and the combustion can be stabilized.

According to the sixth aspect of the present invention, the temperature near the fuel supply port is set at or below the initial fuel pool temperature, and a space is provided near the fuel supply port of the primary vaporization filter on the fuel supply port side. Since it is provided, the fuel supplied to the vaporization chamber flows through the space near the fuel supply port to the primary vaporization filter, where it is vaporized, and the fuel is vaporized only near the fuel supply port. There is no need to worry about local clogging. In addition, impurities such as minute dust contained in the fuel are supplied and gradually accumulated, accumulate on the surface of the vaporization filter facing the fuel supply port, impeding the fuel from flowing into the vaporization chamber, and impairing the fuel supply. However, the presence of a space near the fuel supply port allows the aforementioned impurities to accumulate in that area, and further enlarges the surface of the vaporization filter facing the fuel supply port. Clogging can be prevented.

According to the seventh aspect of the present invention, the primary vaporizing filter and the secondary vaporizing filter are divided and disposed in the vaporizing chamber, and the insertion hole of the primary vaporizing filter on the side of the fuel supply port is provided. The cross-sectional shape of the insertion hole of the secondary vaporization filter on the nozzle side is configured to be partially or entirely smaller than the cross-sectional shape, and the length of the secondary vaporization filter is longer than the longitudinal length of the insertion hole of the secondary vaporization filter. Is shortened, and the shorter portion is made to be a space for the secondary vaporization filter and the primary vaporization filter.
Since the positioning of the secondary vaporization filter is not required, the configuration is simplified. In addition, the cross-sectional area of the vaporization filter on the nozzle side becomes smaller on the nozzle side than on other parts, the resistance when the vaporized gas of the fuel passes increases, and the supplied fuel becomes difficult to pass with insufficient vaporization. . Therefore, tar generation of defective fuel is easily performed on the fuel supply port side, and the vaporized gas reaching the nozzle does not include insufficiently vaporized fuel vaporized gas, and the vaporized gas discharged from the nozzle is stably discharged. Combustion becomes stable. Furthermore, since the nozzle side of the vaporization chamber is a small hole, the heat transfer area is larger than other parts, and the distance to the center of the secondary vaporization filter is also shorter, so the temperature of the center of the secondary vaporization filter is higher. This makes it easier to collect tar as a secondary vaporization unit.

According to the invention of claim 8, the primary vaporizing filter and the secondary vaporizing filter are divided and disposed in the vaporizing chamber, and the vaporizing filter on the nozzle side and the vaporizing on the fuel supply port side are provided. Since the spacers are provided between the filters, the space becomes a spacer portion and the shape of the space is stabilized, and the primary vaporizing filter on the fuel supply port side is used as a primary vaporizing section, and the secondary vaporizing filter on the nozzle side is used as a primary vaporizing section. The secondary vaporizing section can be structurally and precisely separated, and further stabilizes vaporization and stabilizes combustion.

According to the ninth aspect of the present invention, the vaporization net disposed between the primary vaporization filter and the secondary vaporization filter is made of a metal net disposed along the vaporization chamber wall. The effect of claim 8 is obtained,
When the non-vaporized fuel flows out of the primary vaporization filter on the fuel supply port side, it flows along the vaporization chamber wall and is diffused by the vaporization net, so that vaporization is promoted. The vaporization of fuel easily causes film boiling and instability of vaporization such as pulse, but film boiling can be suppressed by the vaporization net, and the vaporized gas ejected from the nozzle is ejected stably and combustion is stabilized Become like

According to the tenth aspect of the present invention, the vaporization diffusion filter disposed between the primary vaporization filter and the secondary vaporization filter includes a secondary vaporization filter on the nozzle side and a primary vaporization filter on the fuel supply port side. Since the density is lower than that of the filter, the effect of claim 9 can be similarly obtained, and the primary vaporizing filter on the fuel supply port side is used as a primary vaporizing section, and the secondary vaporizing filter on the nozzle side is used as a secondary vaporizing filter. The vaporization part and the low-density vaporization diffusion filter between them are structurally divided as an intermediate part where the vaporization promotion and collection parts are mixed, and insufficient vaporization contained in the vaporized gas from the primary vaporization filter on the fuel supply port side The fuel can be collected and vaporized by the vaporization diffusion filter, and the fuel passing through the entire space can be diffused and vaporized.

According to the eleventh aspect of the present invention, the vaporizing diffusion filter spacer disposed between the primary vaporizing filter and the secondary vaporizing filter is provided with a secondary vaporizing filter on the nozzle side and a primary vaporizing filter on the fuel supply port side. Since the same material as the vaporizing filter is used to reduce the cross-sectional shape and provide a space around the same, the effect of claim 10 is similarly obtained, and since the cross-sectional shape is reduced and the space is provided, the fuel supply port side The primary vaporization filter can be structurally divided as a primary vaporization section, and the secondary vaporization filter on the nozzle side can be structurally divided as a secondary vaporization section, so that unvaporized fuel flows out of the primary vaporization filter on the fuel supply port side. In this case, most of the material flows through the vaporization diffusion filter to the secondary vaporization filter on the nozzle side because it is made of the same material as the primary vaporization filter. Comes to be vaporized promoted is further diffused. In addition, fuel that does not pass through the vaporization diffusion filter is accumulated in the space as a tar component such as defective kerosene having a low specific gravity and insufficient vaporization.As a result, the vaporization gas is further suppressed from being tarred and the storage amount is reduced. In many cases, the life of tar can be prolonged, and the tar performance can be improved.

According to the twelfth aspect of the present invention, the vaporizing spacer disposed between the primary vaporizing filter and the secondary vaporizing filter is formed of a corrugated metal sheet having good thermal conductivity. In addition to the above effect, the vaporizing spacer becomes high in temperature due to the radiation of the inner wall of the vaporizing chamber, and the vaporized gas from the primary vaporizing filter comes into contact therewith, further increasing the temperature of the vaporized gas and promoting the vaporization of insufficiently vaporized gas. It is possible to suppress the formation of tar in the vaporized gas and increase the storage amount to extend the life of tar, thereby improving tar performance.

According to the thirteenth aspect of the present invention, the vaporizing spacer provided between the primary vaporizing filter and the secondary vaporizing filter includes a secondary vaporizing filter on the nozzle side and a primary vaporizing filter on the fuel supply port side. Is placed on both ends, and is formed into a thin metal plate formed by bending into a convex shape having a step in the space, so that the effects of claim 12 can be obtained, and vaporization into the vaporization chamber at the time of production of the vaporization unit. By simply inserting the vaporizing spacer on which the filter is mounted, the vaporizing filter can be inserted at the same time and the man-hour can be reduced. In addition, the vaporizing filter is protected by the vaporizing spacer, and the insertion accuracy such as the space dimension is improved.

According to the fourteenth aspect of the present invention, the vaporizing spacer provided between the primary vaporizing filter and the secondary vaporizing filter includes a secondary vaporizing filter on the nozzle side and a primary vaporizing filter on the fuel supply port side. Are placed on both ends, and the cross section of the stepped portion provided in the space portion is a metal molded product having a convex shape and good heat conductivity, so that the effect of claim 13 is obtained,
During the production of the vaporization section, the vaporization filter can be inserted at the same time simply by inserting the vaporization spacer with the vaporization filter placed in the vaporization chamber, which saves man-hours. improves. Also, heat from the inner wall of the vaporizing chamber can be transferred to the vaporizing filter and the space via the vaporizing spacer, and even if a large amount of fuel is temporarily supplied and the temperature of the vaporizing filter is going to decrease, the heat capacity of the vaporizing spacer is large. The temperature change gradually changes by that amount, 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.

According to the fifteenth aspect of the present invention, the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side are fixed to the thin plate-shaped fixing plate by the fastening means. 8 can be obtained, and at the time of production of the vaporizing section, it is only necessary to insert the fixing plate in which the vaporizing filter is fixed by the fastening means into the vaporizing chamber, and since the vaporizing filter and the fixing plate are fixed by the fastening means, vaporization There is no need to worry about the filter coming off the fixing plate, and the ease of assembly is further improved.

According to the sixteenth aspect of the present invention, a space is provided between the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side, and the secondary vaporization filter, the primary vaporization filter, and the space therefor. Since the thin plate-shaped diffusion filter is disposed on the upper surface, the lower surface, or both surfaces of the portion, the effect of claim 8 is similarly obtained, and the primary vaporization filter on the fuel supply port side is used as a primary vaporization portion. The part where the secondary vaporization filter on the nozzle side is structurally divided as the secondary vaporization part and the part which promotes vaporization and diffusion by the diffusion filter which spreads throughout the vaporization chamber are obtained at the same time, and the vaporization promotion spreads throughout the vaporization chamber, Tar gasification of the vaporized gas can be suppressed and the storage amount can be increased to prolong the life of tar, and the tar performance can be improved.

According to the seventeenth aspect of the present invention, a diffusion filter is provided on the upper surface, lower surface, or both surfaces of the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side and the space therebetween. Since the primary vaporization filter and the secondary vaporization filter are fixed to the diffusion filter by fastening means, the assemblability of claim 15 is improved, and the effects of vaporization stability and combustion stability of claim 16 are simultaneously obtained. .

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to a first embodiment of the present invention.

FIG. 2 is a top view of a main part of the combustion apparatus.

FIG. 3 is a cross-sectional view of a hot air heater using the combustion device.

FIG. 4 is a detailed view of a main part of a combustion apparatus according to a second embodiment of the present invention.

FIG. 5 is a detailed view of a main part of a combustion apparatus according to a third embodiment of the present invention.

FIG. 6 is a detailed view of a main part of a combustion apparatus according to a fourth embodiment of the present invention.

FIG. 7 is a detailed view of a main part of a combustion apparatus according to a fifth embodiment of the present invention.

FIG. 8 is a detailed view of a main part of a combustion apparatus according to a sixth embodiment of the present invention.

FIG. 9 is a detailed view of a main part of a combustion apparatus according to a seventh embodiment of the present invention.

FIG. 10 is a detailed view of a main part of a combustion apparatus according to an eighth embodiment of the present invention.

FIG. 11 is a detailed view of a main part of a combustion apparatus according to a ninth embodiment of the present invention.

FIG. 12 is a detailed view of a main part of a combustion apparatus according to a tenth embodiment of the present invention.

FIG. 13 is a detailed view of a main part of a combustion apparatus according to an eleventh embodiment of the present invention.

FIG. 14 is a detailed view of a main part of a combustion apparatus according to a twelfth embodiment of the present invention.

FIG. 15 is a sectional view of a main part of a conventional combustion device.

FIG. 16 is a sectional view of a main part of another conventional combustion device.

[Explanation of symbols]

 41 Vaporizing part 42 Burner receiving seat 43 Nozzle 46 Vaporizing chamber 47A Primary vaporizing filter 47B Secondary vaporizing filter 47C Space 47D Spacer 48 Fuel supply port 53 Burner part 57 Heat receiving part

Claims (17)

[Claims] 1. A vaporizing section having a vaporizing chamber for vaporizing fuel,
The heater includes a heater for heating the vaporizing section, a nozzle for ejecting the gas vaporized in the vaporizing section, and a burner section for burning the gas ejected from the nozzle. The vaporizing chamber has a substantially flat shape. A vaporization filter is divided into two in the vaporization chamber, and a space having a predetermined gap is provided between the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side, and near the fuel supply port. The temperature of the fuel is near or below the initial fuel temperature, and the temperature near the nozzle is near or above the fuel final temperature, and is mechanically and thermally divided into a primary vaporizer and a secondary vaporizer. Combustion device made. 2. The combustion apparatus according to claim 1, wherein the porosity of at least one of the primary vaporization filter and the secondary vaporization filter is made of a foamed metal having a porosity of 90% or more. 3. The primary vaporizing filter and the secondary vaporizing filter are made of a foamed metal having at least one of a porosity of 90% or more, and are formed by pressing the outer periphery of the vaporizing filter into the cross-sectional shape of the vaporizing chamber. 3. The combustion device according to claim 1, wherein the combustion device comprises: 4. The primary vaporizing filter and the secondary vaporizing filter are made of a foamed metal having at least one of a porosity of 90% or more, and have a thermal conductivity between the outer periphery of the vaporizing filter and the inner surface of the vaporizing chamber. 3. The combustion device according to claim 1, wherein a high metal vaporization holder is provided. 5. A heat receiving portion for receiving heat of a burner portion is provided in the vicinity of the vaporizing portion, and a space between the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side is formed near a lower portion of the heat receiving portion. The combustion apparatus according to any one of claims 1 to 4, wherein the combustion apparatus is arranged in a combustion chamber. 6. The combustion apparatus according to claim 1, wherein a space is provided near the fuel supply port of the primary vaporization filter on the fuel supply port side. 7. A primary vaporization filter and a secondary vaporization filter which are divided into two parts and disposed in a vaporization chamber, and a part or the whole of the primary vaporization filter is partially or entirely smaller than a sectional shape of an insertion hole of the primary vaporization filter on a fuel supply port side. In addition, the cross-sectional shape of the insertion hole of the secondary vaporization filter on the nozzle side is configured so that the length of the secondary vaporization filter is shorter than the longitudinal length of the insertion hole of the secondary vaporization filter. 2. The combustion device according to claim 1, wherein a space is provided between the secondary vaporization filter and the primary vaporization filter. 8. A vaporizing chamber, which is divided into two parts, a primary vaporizing filter and a secondary vaporizing filter, and a spacer is provided between the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side. The combustion device according to claim 1, which is disposed. 9. The combustion apparatus according to claim 1, wherein the spacer disposed between the primary vaporization filter and the secondary vaporization filter is a vaporization net made of a metal net disposed along the inner wall of the vaporization chamber. . 10. A spacer disposed between the primary vaporization filter and the secondary vaporization filter serves as a vaporization diffusion filter having a lower density than the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side. Claim 1
A combustion device as described. 11. A spacer provided between the primary vaporization filter and the secondary vaporization filter is made of the same material as the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side and has a reduced cross-sectional shape. 9. A structure as a diffusion filter, wherein a space is provided around the diffusion filter.
A combustion device as described. 12. The combustion apparatus according to claim 1, wherein the spacer provided between the primary vaporization filter and the secondary vaporization filter is a thin metal-plate-like vaporization spacer having a corrugated heat conductivity. 13. A spacer disposed between the primary vaporization filter and the secondary vaporization filter has a secondary vaporization filter on the nozzle side and a primary vaporization filter on the fuel supply port side mounted on both ends, and is provided in a space. 2. A thin metal plate-shaped vaporizing spacer formed by bending a convex shape having a stepped portion.
Or the combustion device according to 8. 14. A spacer provided between the primary vaporization filter and the secondary vaporization filter has a secondary vaporization filter on the nozzle side and a primary vaporization filter on the fuel supply port side mounted on both ends, and is provided in a space. 9. The combustion apparatus according to claim 1, wherein the stepped section has a convex shape and serves as a vaporization spacer of a metal molded product having good heat conductivity. 15. The combustion apparatus according to claim 1, wherein the secondary vaporizing filter on the nozzle side and the primary vaporizing filter on the fuel supply port side are fixed to a thin fixing plate by fastening means. 16. A space is provided between the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side, and a thin plate is provided on the upper surface, lower surface, or both surfaces of the secondary vaporization filter, the primary vaporization filter, and the space. The combustion device according to claim 1, further comprising a diffusion filter having a shape of a circle. 17. A diffusion filter is provided on the upper or lower surface or both surfaces of the secondary vaporization filter on the nozzle side and the primary vaporization filter on the fuel supply port side and the space between them, and the primary vaporization filter is provided on the diffusion filter. 17. The combustion device according to claim 16, wherein the secondary vaporization filter is fixed by fastening means.