JP2001221409A - Combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stabilized gasification, a stabilized combustion and an extended life time of tar. SOLUTION: A gasification chamber 46 is formed into a substantial flat shape, a plurality of gasification filters 48A, 48D, 47C and 47D are divided and arranged at the gasification chamber 46, a space is arranged among each of the gasification filters 48A, 48D, 47C and 47D, the temperature near the fuel supplying port 47 is set at an initial carbonization temperature of fuel or less than it and the temperature near the nozzle 43 is set at a final carbonization temperature of fuel or more than it, the fuels are divided in a stepwise manner in view of mechanism or thermal state to a primary gasification part and a secondary gasification 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 this liquid fuel gas will be described as an example. Such a combustion device is configured as shown in FIG.

That is, first, fuel is supplied from the cartridge tank 2 to the tank 1, and the fuel in the tank 1 is supplied 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, in order to solve such a problem, a combustion device as shown in FIG. 10 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 18.

A burner 23 is mounted on the vaporizer 14 so as to cover the outlet of the mixing tube 16. The burner 23 is formed by a combustion flame formed in a flame hole 24 formed in the peripheral wall of the burner 23. The flange 25 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 is opened, and the vaporized gas is ejected from the nozzle 18. The vaporized gas flows vigorously toward the mixing pipe 16 provided at the center of the vaporizing section 14, and accordingly, the 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 into the burner section 23. And mix
It is ignited on the outer periphery of the burner section 23 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 and burned from a large number of flame holes 24 provided in the lower peripheral wall of the burner portion 23, 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 26 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
5 is heated by the combustion flame formed in the flame hole 24 formed in the peripheral wall of the burner section 23, and the vaporization section 14 is heated by the heat conduction from the burner section 23, 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 vaporization chamber having a substantially flat shape, and a vaporization filter divided into a plurality of parts and disposed in the vaporization chamber. A space is provided between the vaporization filters, and the temperature in the vicinity of the filler port is near or below the initial storage temperature of the fuel, and the temperature in the vicinity of the nozzle is near or above the final storage temperature of the fuel. The vaporizer is mechanically and thermally divided.

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, since the vaporization filter is divided into a plurality of parts in the vaporization chamber and a space is provided between the vaporization filters, the vaporization filter on the fuel supply port side is used as a primary vaporization part. Further, the vaporizing filter on the nozzle side can be divided stepwise or mechanically as a secondary vaporizing section, and the primary vaporizing section mainly vaporizes the vaporizing section, and the secondary vaporizing section vaporizes the vaporized gas more completely and does not vaporize. By functioning as a tar collecting portion for high-boiling components and the like, vaporization can be stabilized and combustion can be stabilized 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. , The vaporization filter is divided into a plurality of parts and arranged, and the primary vaporization part and the secondary vaporization part are mechanically operated in stages.
Because it is thermally divided, it stabilizes vaporization and stabilizes combustion, and vaporizes fuel only near the fuel supply port, causing local clogging, or insufficient vaporization due to insufficient heat, Eliminates the risk of poor vaporization due to easy generation of tar or fuel jetting out of the nozzle as liquid, suppressing tarification of vaporized gas and increasing the capacity to extend the life of tar. To improve tar performance.

[0029]

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 nozzle portion for ejecting gas vaporized in the vaporizing section,
The vaporization chamber has a substantially flat shape, and a vaporization filter is divided into a plurality of parts and disposed in the vaporization chamber, between the vaporization filters. A space is provided, and the temperature near the filler port is set to the temperature near or below the initial storage point of the fuel, and the temperature near the nozzle is set to the temperature near or above the final storage point of the fuel. , And is thermally divided.

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 diffuses 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 a plurality of parts in the vaporization chamber, and a space is provided between the vaporization filters, so that some of the vaporization filters on the side of the fuel supply port are primary vaporized. Part and some of the vaporizing filters on the nozzle side can be divided stepwise and mechanically as a secondary vaporizing part. The primary vaporizing part is mainly a vaporization promoting part, and the secondary vaporizing part is more complete with vaporized gas. By functioning as a tar collecting portion for high-boiling components and the like that is vaporized and not vaporized, vaporization can be stabilized and combustion can be stabilized. 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. , The vaporization filter is divided into a plurality of parts and arranged, and the primary vaporization part and the secondary vaporization part are mechanically operated in stages.
Because it is thermally divided, it stabilizes vaporization and stabilizes combustion, and vaporizes fuel only near the fuel supply port, causing local clogging, or insufficient vaporization due to insufficient heat, Eliminates the risk of poor vaporization due to easy generation of tar or fuel jetting out of the nozzle as liquid, suppressing tarification of vaporized gas and increasing the capacity to extend the life of tar. To improve tar performance.

According to a second aspect of the present invention, the vaporization filter divided into a plurality in the vaporization chamber has a porosity of 90%.
% Or more of metal foam.

The vaporization filter divided into a plurality of parts and disposed in the vaporization chamber is made of a foamed metal having a porosity of 90% or more, so that the pores can be made uniform and dense, and the porosity can be reduced. As a result, the tar storage capacity can be increased, and furthermore, a metal material having good heat conductivity can be used, so that the inside can be heated to a high temperature, and the vaporization area can be enlarged to promote vaporization.

According to a third aspect of the present invention, the vaporization filter divided into a plurality in the vaporization chamber has a porosity of 90%.
% Of a foamed metal, and the outer periphery of the vaporizing filter is formed by pressing the cross-sectional shape of the vaporizing chamber.

The vaporizing filter divided into a plurality of parts and disposed in the vaporizing chamber is made of a foamed metal having a porosity of 90% or more, and is formed by pressing the outer periphery of the vaporizing filter into a sectional shape of the vaporizing chamber. Therefore, the effect of claim 2 can be 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 temperature of the vaporization chamber wall reaches the center. Easier,
Further vaporization can be 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, 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.

Further, since the porosity of the vaporizing filter is made of foamed metal having a porosity of 90% or more, the porosity does not decrease so much even when compressed. The porosity is 85% or more and is hardly affected by compression, the tar storage capacity is large, heat conduction is good, and it is possible to raise the temperature to the inside,
The vaporization area can be expanded to promote vaporization.

The invention according to claim 4 has a structure in which a vaporizing filter is divided into a plurality in a vaporizing chamber, and a spacer is provided between the vaporizing filters to provide a space.

The vaporizing filter is divided into a plurality of parts in the vaporizing chamber, and a spacer is provided between the respective vaporizing filters to provide a space. In addition to the above, the space becomes a spacer portion, the space shape is stabilized, and each vaporizing filter can be structurally and precisely separated. Some of the vaporizing filters on the fuel supply port side are used as primary vaporizing portions, and Some vaporization filters on the side can be transitioned in stages as a secondary vaporizer,
Further, the vaporization can be stabilized and the combustion can be stabilized.

Further, the invention of claim 5 is configured such that the spacer provided between the vaporizing filters uses a vaporizing diffusion filter having a lower density than the vaporizing filter.

Further, since the spacers provided between the vaporizing filters use vaporizing diffusion filters having a lower density than the vaporizing filters, the effect of claim 4 can be obtained and the fuel supply port side can be obtained. Some vaporizing filters are used as primary vaporizing sections, and some vaporizing filters on the nozzle side are used as secondary vaporizing sections, and a low-density vaporizing diffusion filter between the vaporizing filters is an intermediate part where the vaporization promoting and trapping sections are mixed. Insufficiently vaporized fuel contained in the vaporized gas from the vaporization filter can be collected and vaporized by the vaporization diffusion filter, and the fuel passing through the entire space can be diffused and vaporized. Will be able to do it. In addition, when non-vaporized fuel flows out of the vaporization filter on the fuel supply port side, vaporization of the fuel in the high temperature space tends to cause film boiling and unstable vaporization such as a pulse. The film boiling can be suppressed by the diffusion filter, the vaporized gas ejected from the nozzle is ejected stably, and the combustion becomes stable.

According to a sixth aspect of the present invention, the spacer provided between the vaporizing filters is a thin metal-plate-shaped vaporizing spacer formed by bending an uneven shape into a plurality.
A vaporizing filter is placed in the recess, and the projection is a space.

The spacer provided between the vaporizing filters is a thin metal plate-shaped vaporizing spacer formed by bending the uneven shape into a plurality of shapes, and the vaporizing filter is placed in the concave portion so that the convex portion becomes a space. Thus, the effect of claim 4 is obtained, and the vaporizing spacer is heated to a high temperature due to the heat transfer and radiation of the vaporizing chamber inner wall, and the vaporized gas from the vaporizing filter comes in contact with the vaporized spacer to further increase the temperature of the vaporized gas. Thus, the vaporization of the insufficiently vaporized gas can be promoted, the tarification of the vaporized gas can be suppressed, the storage amount can be increased, and the life of the tar can be prolonged, so that the tar performance can be improved. Also, at the time of manufacturing the vaporizing section, only by inserting the vaporizing spacer with multiple vaporizing filters placed in the vaporizing chamber, multiple vaporizing filters can be inserted at the same time, saving man-hours. The insertion accuracy such as dimensions is also improved.

According to a seventh aspect of the present invention, the spacer provided between the vaporizing filters is a vaporized spacer of a metal molded product such as a cut or forged metal having good thermal conductivity in which a cross section is formed in a plurality of irregularities. A vaporizing filter is placed in the concave portion, and the convex portion is a space.

The spacer disposed between the vaporizing filters is a vaporizing spacer of a metal molded product such as cutting or forging having good thermal conductivity in which a plurality of cross sections are formed in an uneven shape, and the vaporizing filter is mounted in the concave portion. And the convex portion is configured to be a space, so that the effect of claim 6 is obtained, and at the time of manufacturing the vaporizing portion, only by inserting the vaporizing spacer on which the plurality of vaporizing filters are mounted into the vaporizing chamber. A plurality of vaporizing filters can be inserted at the same time, so that the man-hour can be saved, and the vaporizing filters are 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 of the heat received by the combustion heat, so that the vaporization performance is stabilized.

The invention according to claim 8 is configured such that the vaporization filter is divided into a plurality in the vaporization chamber, and the divided vaporization filters are fixed to a thin fixing plate by fastening means. .

The vaporizing filter is divided into a plurality of parts in the vaporizing chamber, and the plural divided vaporizing filters are fixed to the thin plate-like fixing plate by the fastening means. At the same time, it is only necessary to insert a fixing plate in which the vaporizing filter is fixed to the vaporizing chamber by the fastening means at the time of manufacturing the vaporizing section, and the plurality of vaporizing filters and the thin plate-shaped fixing plate are fixed by the fastening means. There is no need to worry about the plurality of vaporizing filters coming off the fixing plate, and the assemblability is further improved.

According to a ninth aspect of the present invention, a vaporization filter is divided into a plurality of vaporization chambers in a vaporization chamber, and a diffusion filter is disposed on an upper surface, a lower surface, or both surfaces of the plurality of vaporization filters. It is configured such that a plurality of vaporized filters are fixed to the filter by fastening means.

The vaporization filter is divided into a plurality in the vaporization chamber, and a diffusion filter is disposed on the upper surface, the lower surface, or both surfaces of the vaporization filters, and the vaporization filter is divided into the diffusion filters. Since the filter is fixed by the fastening means, the effect of the fixing plate according to claim 8 can be similarly obtained, and some of the vaporizing filters on the fuel supply port side are used as vaporizing sections.
In addition, a part where some vaporization filters on the nozzle side are structurally divided as a secondary vaporization part and a part that promotes vaporization and diffusion with a diffusion filter that spreads throughout the vaporization chamber are obtained at the same time. Spreading and suppressing the formation of tar in the vaporized gas can be suppressed, and the capacity of the gas can be increased to extend the life of the tar, thereby improving the tar performance.

[0052]

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 configuration 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 behind 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 vaporizing portion, on which a circular burner receiving seat 4 is provided.
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 47 for supplying fuel is provided at the end opposite to the nozzle 43, and the outer periphery thereof is made of foamed metal having a porosity of 90% or more. The vaporization filters 48A, 48B, 48C and 48D are formed by pressing and forming into a cross section of the shape shown in FIG. 4 and a space is provided near the fuel supply port of the vaporization filter 48A.

Further, each vaporizing filter 48A,
48B, 48C, 48D, three metal annular ring spacers 49A, 49B, 49C are arranged to provide a space between the vaporizing filters 48A, 48B, 48C, 48D.
The temperature near the fuel supply port 47 is near or below the initial fuel pool temperature, and the temperature near the nozzle 43 is near or above the fuel final pool temperature, and the primary and secondary vaporizers are used. It is divided stepwise, mechanically and thermally.

Further, a U-shaped heater 50 is disposed so as to extend along approximately a half 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 52 provided with a temperature detecting means 51 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 vaporizer 41 is provided with the convection blower 3.
It is configured to cool from the side of the fuel supply port 47 of the vaporization chamber 46 by the airflow from 8.

Numeral 53 denotes a bottomless cylindrical mixing tube mounted on the burner receiving seat 42 so as to be located above the nozzle 43, and is formed in an upward tapered shape having a slightly larger upper portion.
The mixing tube 53 has a throat-shaped inlet portion, and faces the nozzle 43. The mixing tube 53 serves to supply the fuel gas ejected from the nozzle 43 and the primary air sucked by the ejector effect of the ejection of the fuel gas. It is designed to be mixed.

Numeral 54 denotes a canned 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 53, and a combustion portion is provided in a large number of flame holes 55 provided in the lower peripheral wall. It is 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 55, and reference numeral 57 denotes a heat receiving portion formed on the burner receiving seat 42.

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 sucked up from the tank 32 by the pump 34 and sent to the vaporization chamber 46 of the combustion device 36 through the oil supply pipe 35 and the fuel supply port 47. Can be The sent fuel is vaporized in the vaporization chamber 46 maintained at a predetermined temperature or higher by the heater 50 and becomes a high-pressure fuel gas and is ejected from the nozzle 43. At this time, the primary air is sucked by the ejector effect and the vaporization chamber 46 is sucked. Are mixed in a mixing pipe 53 provided on the downstream side of the combustion chamber, supplied to a burner section 54, ejected from a flame hole 55, and
Burned at 6. 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 50, 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 burner section 54, the fuel gas ejected from the nozzle 43 flows into the mixing pipe 53 provided on the downstream side of the vaporization chamber 46 while sucking the primary air by the ejector effect. Here, the mixture is mixed,
Is discharged into the burner section 54 from the upper opening of the mixing pipe 53.
It flows back around the outer periphery, and is ejected from a large number of flame holes 55 provided below the burner portion 54 to burn.

At this time, the mixed gas is turned back to the burner section 54 and flows around the mixing pipe 53. At this portion, diffusion mixing and uniform pressure are promoted, and the mixed gas is jetted out uniformly from the flame hole 55 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 part 56 of the burner part 54, 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 50.

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 54 is transmitted to the vaporization chamber 46 through the burner receiving seat 42, the temperature on the fuel supply port 47 side of the vaporization chamber 46 is lowered 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 47 can be set to a temperature near or below the initial storage point of the fuel, and the temperature in the vicinity of the nozzle 43 can be set to a temperature near or above the end storage point of the fuel. Become like

Also, since the temperature near the fuel supply port 47 is near or below the initial fuel pool temperature,
The fuel supplied to the vaporization chamber 46 is not vaporized at the fuel supply port 47 inlet or the oil supply pipe 35 without being started.
The fuel flows to the vaporizing filter 48A near the fuel supply port 47 and is vaporized there, so that there is no fear that the fuel is vaporized only near the fuel supply port 47 and locally clogged.

The heat supplied to the vaporizing chamber 46 is transferred to the vaporizing chamber 46 by 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.

The fuel entering from the fuel supply port 47 has a substantially flat shape in the vaporization chamber 46, so that the fuel spreads and spreads in the horizontal direction and gradually reaches the nozzle 43 while being vaporized. To evaporate. At this time, since the temperature near the fuel supply port 47 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 47 goes slightly ahead of the fuel supply port 47 and also in the lateral 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, four divided vaporizing filters 48A, 48B, 48C, 48D are provided in the vaporizing chamber 46, and the vaporizing filters 48A, 48B,
A ring spacer 49A, 49B between 48C and 48D;
Since the space is provided by providing 49C, the fuel supply port 47 is provided.
The vaporizing filters 48A and 47B on the side are used as primary vaporizing sections, and the vaporizing filters 47C and 47D on the nozzle side are used as two primary vaporizing sections.
It can be mechanically divided as a secondary vaporization section. The primary vaporization section mainly functions as a vaporization promotion section, and the secondary vaporization section functions as a tar collection section for high-boiling components and the like that completely vaporize the vaporized gas and do not vaporize. , The vaporization can be stabilized and the combustion can be stabilized.

Further, a metal ring spacer 49A,
Since the 49B and 49C are provided, the above-mentioned space is secured by the respective ring spacers 49A, 49B and 49C, the space shape is stabilized, and the vaporizing filter 48 is provided.
A and 47B are used as the primary vaporizing section, and the vaporizing filter 4
7C and 47D can be structurally and strictly divided as a secondary vaporizing section, and further, vaporization can be stabilized and combustion can be stabilized.

Further, each vaporizing filter 4
Ring spacer 49 between 8A, 48B, 48C, 48D
In the space formed by A, 49B, and 49C, a part of the large particles of the tar component generated without being vaporized by the vaporizing filters 48A, 48B, and 48C accumulates, and the next vaporizing filters 47B, 48C, and 48D accumulate. Since the amount of the tar component can be reduced, clogging of the vaporization filter 48D on the nozzle 43 side can be reduced.

That is, since the vaporizing 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 47 can be reduced to a value close to or lower than the temperature of the initial fuel collection point on a wide heat transfer surface. 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, so that the fuel can perform an ideal vaporization transfer, and the vaporization filters 48A, 48B, 48C, 48D divided into a plurality are arranged. Since 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 in the vicinity of the fuel supply port 47 and locally. Clogging may occur, or insufficient vaporization may occur due to insufficient heat, so that tar may be easily generated, or the fuel may remain in a liquid state when the nozzle 4
There is no fear that the gas is ejected from the nozzle 3 to cause poor vaporization, the vaporization gas can be suppressed from being tarred, the storage amount can be increased, and the life of the tar can be prolonged, so that the tar performance can be improved.

The vaporization filters 48A, 48B, 48C and 48D which are divided into a plurality of parts in the vaporization chamber are made of foamed metal having a porosity of 90% or more.
The pores can be made uniform and dense, the porosity is increased, the tar storage volume can be increased, and furthermore, it is made of a metal material with good heat conductivity, and it is possible to raise the temperature to the inside, and the vaporization area can be increased. It can be expanded to promote vaporization, and the vaporization filter 48
The outer periphery of A, 48D, 47C, and 47D is compressed into the cross-sectional shape of the vaporization chamber 46, the tissue becomes dense, and heat conduction is improved, so that the temperature of the inner wall of the vaporization chamber 46 can easily reach the center,
Further vaporization can be promoted.

Further, in order to form the foamed metal into a predetermined shape of the vaporizing filters 48A, 48B, 48C, 48D, when a shearing process such as a punching press is performed, the end portion is compressed at an inclination of about 45 °, and the portion becomes an eye. In other words, there is a problem that the flow of fuel is obstructed.In addition, there is a concern that laser processing or the like requires a long processing time and costs, and furthermore, because of the foamed shape, the end structure is weak and chips are generated, which may cause a problem. However, it is possible to easily obtain a predetermined shape by pressing and shaping the foamed metal into the cross-sectional shape of the vaporization chamber 46.

Further, the vaporizing filters 48A, 48A,
Since the porosity of 8B, 48C, and 48D is made of a foamed metal having a porosity of 90% or more, the porosity does not decrease so much even when compressed. The porosity is 85% or more and is hardly affected by compression, the heat capacity is good while the tar storage volume is large, and it is possible to raise the temperature to the inside, so that the vaporization area can be expanded and the vaporization can be promoted. Become.

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 according to the second embodiment, the spacers disposed between the vaporizing filters 48A, 48B, 48C and 48D use the vaporizing diffusion filters 60A, 60B and 60C having a lower density than the vaporizing filters. There is as a configuration.

Then, each of the vaporizing filters 4
The spacers disposed between 8A, 48B, 48C and 48D correspond to the vaporizing filters 48A, 48B, 48C and 48D.
Vaporization diffusion filters 60A, 60 having a lower density than D;
Since B and 60C are used, the effect of the ring spacer of the first embodiment is obtained, and the two vaporizing filters 48A and 48B on the fuel supply port 47 side are used as primary vaporizing sections.
Also, two vaporizing filters 48C, 4C on the nozzle 43 side.
8D is used as a secondary vaporizing section, and the vaporizing filters 48A and 48A
B, 48C, and 48D, the low-density vaporization diffusion filters 60A, 60B, and 60C are structurally divided as an intermediate portion in which the vaporization promotion and collection sections are mixed, and the vaporization filters 48A,
The insufficiently vaporized fuel contained in the vaporized gas from 48B and 48C is removed by the vaporization diffusion filters 60A, 60B,
At 60C, the fuel can be collected and promoted to vaporize, and the fuel passing through the entire space can be diffused to promote vaporization. Further, a vaporizing filter 48 on the fuel supply port 47 side.
When the non-vaporized fuel flows out of the fuel cell A, the vaporization of the fuel in the space where the temperature becomes high tends to cause film boiling and unstable vaporization such as a pulse, but the vaporization diffusion filter 60A
Thus, the film boiling can be suppressed, and the vaporized gas ejected from the nozzle 43 is ejected stably, so that the combustion becomes stable.

(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 vaporizing filters 48A, 48B, 48C, and 48D are placed in the concave portions, and the convex and concave portions are bent into plural pieces so that the convex portions become spaces. Is provided.

Then, the vaporizing filters 48A, 48A
B, 48C, and 48D are placed in the concave portions, and a thin metal plate-shaped vaporizing spacer 61 formed by bending the concave and convex shape into a plurality of portions so that the convex portions become spaces is provided. While the effect of the ring spacer is obtained, the vaporizing spacer 61 becomes high in temperature due to heat transfer and radiation of the inner wall of the vaporizing chamber 46, and the vaporizing filters 48A, 48B,
The vaporized gas from 48C can be touched to further increase the temperature of the vaporized gas and promote the vaporization of the vaporized gas that is insufficiently vaporized, thereby suppressing the vaporization of the vaporized gas and increasing the capacity to extend the life of tar. And improve tar performance. Further, when the vaporizing section 41 is manufactured, a plurality of vaporizing filters 48A, 48B, 48C, 48D are supplied to the vaporizing chamber 46.
A plurality of vaporizing filters 48A, 48B, 48C, and 48D can be inserted at the same time simply by inserting the vaporizing spacer 61 on which is mounted, and the man-hour can be omitted, and the vaporizing filters 48A, 48B, 48C, and 48D are protected by the vaporizing spacer 61. The insertion accuracy such as the space dimension is also improved.

(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 of Example 4, the vaporizing filters 48A, 48B, 48C, and 48D were provided with the vaporizing filters in their concave portions, and a plurality of cross sections were formed so that the convex portions became spaces. The configuration is such that a vaporized spacer 62 of a metal molded product such as cutting or forging having good heat conductivity is provided.

Then, the vaporizing filters 48A, 48
B, 48C, and 48D are provided with a vaporization filter in the concave portions, and the vaporized spacers of a metal molded product such as cutting or forging having good thermal conductivity in which a plurality of concave and convex shapes are formed so that the convex portions become spaces. Since the vaporizer 62 is provided, the effect of the vaporizing spacer of the third embodiment is obtained, and a plurality of vaporizing filters 48A, 48B, 48 are supplied to the vaporizing chamber 46 when the vaporizing section 41 is manufactured.
A plurality of vaporizing filters 48A, 48B, 48C, and 48 are simply inserted by inserting the vaporizing spacer 62 on which C and 48D are placed.
D can be inserted at the same time to save man-hours, and the vaporizing filters 48A, 48B, 48C, 4
8D is protected, and the insertion accuracy such as the space dimension is also improved.
Further, heat from the inner wall of the vaporizing chamber 46 can be transferred to the vaporizing filters 48A, 48B, 48C, 48D and the space through the vaporizing spacer 62, and a large amount of fuel is temporarily supplied to the vaporizing filters 48A, 48B, 48C, 48D. Even if the temperature is going to decrease, since the heat capacity of the vaporizing spacer is large, the temperature change gradually changes, and during that time, the temperature of the vaporizing chamber 46 is corrected by the feedback by receiving the combustion heat, so that the vaporizing performance is reduced. 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 vaporization filters 48A, 48B, 48 divided into four in the vaporization chamber 46 are provided.
C and 48D are provided, and the vaporized filters 48A, 48B, 48C and 48D divided into four are fixed to a thin fixing plate 63 by fastening means 64.

The vaporizing chamber 46 is provided with four divided vaporizing filters 48A, 48B, 48C, and 48D, and the four divided vaporizing filters 48A,
Since 48B, 48C and 48D are fixed to the thin plate-like fixing plate 63 by the fastening means 64, the effect of dividing the vaporizing filters 48A, 48B, 48C and 48D of the first embodiment can be obtained, and At the time of manufacture, it is only necessary to insert the fixing plate 63 in which the vaporizing filters 48A, 48B, 48C, 48D are fixed by the fastening means 64 into the vaporizing chamber 46, and a plurality of vaporizing filters 48A, 48B, 48C, 4C are formed.
8D and the thin fixing plate 63 are fixed by the fastening means 64, so that the vaporizing filters 48A, 48B, 48C, 48D
Does not come off from the fixing plate 63, and the assemblability is further improved.

(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.

The combustion apparatus of the sixth embodiment has four vaporization filters 48A, 48B, 48 divided into four in the vaporization chamber 46.
C, 48D, and a diffusion filter 65 on the upper surface, lower surface, or both surfaces of the four divided vaporizing filters 48A, 48B, 48C, 48D, and four divided vaporizing filters. Filters 48A, 48B, 48C, 48D are fixed by fastening means 66.

The vaporization chamber 46 is provided with four divided vaporization filters 48A, 48B, 48C, 48D, and the four divided vaporization filters 48A,
A diffusion filter 65 is provided on the upper surface, the lower surface, or both surfaces of 48B, 48C, and 48D.
Since A, 48B, 48C, and 48D are fixed by the fastening means 66, the effect of the fixing plate 63 of the fifth embodiment can be obtained in the same manner, and the two vaporization filters 48A and 48B on the fuel supply port 47 side are connected to one another. As a secondary vaporizer, the nozzle 43
A portion where the two vaporizing filters 48C and 48D on the side are structurally divided as a secondary vaporizing portion, and a portion which promotes vaporization and diffusion by the diffusion filter 65 extending throughout the vaporization chamber 46 are obtained at the same time. 46, the tarification of the vaporized gas is suppressed, the storage capacity is increased, the life of the tar can be extended, and the tar performance can be improved.

In the above embodiment, the vaporizing filters 48A, 48B, 48 which are divided and disposed in the vaporizing chamber 46 are provided.
C and 48D are made of foamed metal having a porosity of 90% or more. However, any one or all of them may be used as a vaporization filter made of another material, and the configuration of each part also achieves the object of the present invention. The configuration may be any as long as it is within the range.

[0094]

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.

Since the fuel entering through the fuel supply port has a substantially flat vaporizing chamber, the fuel spreads in the horizontal direction and is diffused, 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 a plurality of parts in the vaporization chamber, and a space is provided between the vaporization filters, so that some of the vaporization filters on the fuel supply port side are primary vaporized. Part and some of the vaporizing filters on the nozzle side can be divided stepwise and mechanically as a secondary vaporizing part. The primary vaporizing part is mainly a vaporization promoting part, and the secondary vaporizing part is more complete with vaporized gas. By functioning as a tar collecting portion for high-boiling components and the like that is vaporized and not vaporized, vaporization can be stabilized and combustion can be stabilized. 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. , The vaporization filter is divided into a plurality of parts and arranged, and the primary vaporization part and the secondary vaporization part are mechanically operated in stages.
Because it is thermally divided, it stabilizes vaporization and stabilizes combustion, and vaporizes fuel only near the fuel supply port, causing local clogging, or insufficient vaporization due to insufficient heat, Eliminates the risk of poor vaporization due to easy generation of tar or fuel jetting out of the nozzle as liquid, suppressing tarification of vaporized gas and increasing the capacity to extend the life of tar. To improve tar performance.

According to the second aspect of the present invention, since the vaporization filter divided and disposed in the vaporization chamber is made of a foamed metal having a porosity of 90% or more, the pores are uniform and dense. The porosity is increased, the tar storage volume can be increased, and a metal material with good heat conductivity can be used, so that the inside can be heated to a high temperature, and the vaporization area is expanded to promote vaporization. become able to.

According to the third aspect of the present invention, the vaporization filter divided and disposed in the vaporization chamber is made of a foamed metal having a porosity of 90% or more, and the outer periphery of the vaporization filter is formed in the vaporization 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.

Further, since the porosity of the vaporizing filter is made of a foamed metal having a porosity of 90% or more, the porosity does not decrease so much even when the filter is compressed. The porosity is 85% or more and is hardly affected by compression, the tar storage capacity is large, heat conduction is good, and it is possible to raise the temperature to the inside,
The vaporization area can be expanded to promote vaporization.

According to the fourth aspect of the present invention, the vaporizing filter is divided into a plurality of parts in the vaporizing chamber.
Since a spacer is provided between each vaporizing filter and a space is provided, the effect of claim 1 is similarly obtained, and the space becomes a spacer portion, the space shape is stabilized, and each vaporizing filter is formed. Structurally and precisely, some vaporizing filters on the fuel supply port side can be changed in stages as primary vaporizing parts, and some vaporizing filters on the nozzle side can be changed in stages as secondary vaporizing parts. This further stabilizes vaporization and stabilizes combustion.

According to the fifth aspect of the present invention, the spacer provided between the respective vaporization filters uses a vaporization diffusion filter having a lower density than that of the vaporization filter. In addition, some vaporization filters on the fuel supply port side are used as primary vaporization parts, and some vaporization filters on the nozzle side are used as secondary vaporization parts, and vaporization diffusion filters with low density between vaporization filters are vaporized. Structurally divided as an intermediate part where the promotion and collection sections are mixed, insufficiently vaporized fuel contained in the vaporized gas from the vaporization filter can be collected by the vaporization diffusion filter to promote vaporization, and the entire space can be promoted. The fuel passing therethrough can be diffused and promoted to vaporize. In addition, when non-vaporized fuel flows out of the vaporization filter on the fuel supply port side, vaporization of the fuel in the high temperature space tends to cause film boiling and unstable vaporization such as a pulse. The film boiling can be suppressed by the diffusion filter, and the vaporized gas ejected from the nozzle is ejected stably, and the combustion becomes stable.

According to the sixth aspect of the present invention, the spacer provided between the vaporizing filters is a thin metal-plate-shaped vaporizing spacer formed by bending an uneven shape into a plurality of shapes, and the vaporizing filter is placed in the concave portion. In addition, since the convex portion is configured to be a space, the effect of claim 4 is obtained, and the vaporizing spacer becomes high in temperature due to heat transfer and radiation of the vaporizing chamber inner wall, and the vaporized gas from the vaporizing filter is generated. Can further increase the temperature of the vaporized gas and promote the vaporization of the vaporized gas that is insufficiently vaporized, suppress the vaporization of the vaporized gas, increase the capacity, and prolong the life of the tar. Be able to improve. Also, at the time of manufacturing the vaporizing section, only by inserting the vaporizing spacer with multiple vaporizing filters placed in the vaporizing chamber, multiple vaporizing filters can be inserted at the same time, saving man-hours. The insertion accuracy such as dimensions is also improved.

According to the seventh aspect of the present invention, the spacer disposed between the vaporizing filters is a vaporized spacer of a metal molded product such as cut or forged having a good thermal conductivity in which a cross section is formed in a plurality of irregularities. Since the vaporizing filter is placed in the concave portion and the convex portion is configured to be a space, the effect of claim 6 is obtained, and a plurality of vaporizing filters are mounted on the vaporizing chamber when the vaporizing portion is manufactured. By simply inserting the vaporizing spacers placed, a plurality of vaporizing filters can be inserted at the same time, reducing man-hours. In addition, the vaporizing filters are protected by the vaporizing spacers, and the insertion accuracy such as spatial dimensions 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 of the heat received by the combustion heat, so that the vaporization performance is stabilized.

According to the eighth aspect of the present invention, the vaporization filter is divided into a plurality in the vaporization chamber and disposed.
Since the vaporized filter divided into a plurality is fixed to the thin fixing plate by the fastening means, the effect of claim 4 is obtained, and the vaporization filter is fixed to the vaporization chamber by the fastening means at the time of manufacturing the vaporizing section. It only needs to insert the fixing plate, and since the plural vaporizing filters and the thin plate-shaped fixing plate are fixed by the fastening means, there is no need to worry about the plural vaporizing filters coming off the fixing plate, further improving the assemblability. .

According to the ninth aspect of the present invention, the vaporization filter is divided into a plurality of parts and disposed in the vaporization chamber.
A diffusion filter is provided on the upper surface, lower surface, or both surfaces of the plurality of vaporization filters, and the vaporization filter divided into a plurality of portions is fixed to the diffusion filter by fastening means. It is obtained in the same way, and the whole of the vaporization chamber is divided into parts where some vaporization filters on the side of the fuel supply port are structurally divided as vaporizers and some vaporizer filters on the nozzle side as secondary vaporizers. A part that promotes vaporization and diffusion is obtained at the same time by the diffusion filter, and the vaporization promotion is spread over the entire vaporization chamber, suppressing the vaporization of gas into tar and increasing the storage capacity to prolong the life of tar. Can be improved.

[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 sectional view of a main part of a conventional combustion device.

FIG. 10 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 47 Fuel supply port 48A, 48D, 47C, 47D Vaporizing filter 49A, 49A, 49C Ring spacer 54 Burner part

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Noriyuki Yoneno 1006 Kazuma Kadoma, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor Motohiko Kitamura 1006 Kazuma Kadoma, Kadoma City, Osaka Prefecture F-term in Matsushita Electric Industrial Co., Ltd. (reference) 3K052 AA07 AB01 AB08 CA03 CA04 CA08 CA09 CA12 CA13

Claims (9)

[Claims] 1. A vaporizing section having a vaporizing chamber for vaporizing fuel,
The heater includes a heater for heating the vaporizing section, a nozzle section for ejecting gas vaporized in the vaporizing section, and a burner section for burning gas ejected from the nozzle section. The vaporizing chamber has a substantially flat shape. The vaporization filter is divided into a plurality of parts and disposed in the vaporization chamber, a space is provided between the vaporization filters, and the temperature in the vicinity of the fuel supply port is lower than or equal to the initial storage point temperature of the fuel, in the vicinity of the nozzle. A combustion device in which the temperature is set to a temperature close to or higher than the end point temperature of the fuel. 2. The combustion apparatus according to claim 1, wherein the vaporization filter divided and disposed in the vaporization chamber is made of a foamed metal having a porosity of 90% or more. 3. A vaporizing filter which is divided into a plurality and disposed in a vaporizing chamber is made of a foamed metal having a porosity of 90% or more, and is formed by pressing an outer periphery of the vaporizing filter into a sectional shape of the vaporizing chamber. 3. The combustion device according to claim 1, wherein the combustion device comprises: 4. The combustion apparatus according to claim 1, wherein the vaporization filter is divided into a plurality in the vaporization chamber, and a spacer is provided between the vaporization filters to provide a space. 5. The combustion apparatus according to claim 1, wherein the spacer disposed between the vaporization filters is a vaporization diffusion filter having a lower density than the vaporization filter. 6. A spacer provided between the vaporizing filters is a thin metal plate-shaped vaporizing spacer formed by bending an uneven shape into a plurality of shapes, and the vaporizing filter is placed in the concave portion so that the convex portion becomes a space. 5. The combustion device according to claim 1, wherein the combustion device is configured as follows. 7. A spacer provided between each of the vaporizing filters is a vaporizing spacer of a metal molded product such as cutting or forging having good thermal conductivity in which a cross section is formed in a plurality of irregularities. The combustion apparatus according to claim 1 or 4, wherein the projections are arranged so as to form a space. 8. The combustion apparatus according to claim 1, wherein the vaporization filter is divided into a plurality of parts in the vaporization chamber, and the plurality of divided vaporization filters are fixed to a thin plate-like fixing plate by fastening means. 9. A vaporization filter is divided into a plurality of vaporization chambers in a vaporization chamber, a diffusion filter is disposed on an upper surface, a lower surface, or both surfaces of the vaporization filters, and the vaporization filter is divided into a plurality of vaporization filters. The combustion device according to claim 1, wherein the filter is fixed by fastening means.