JPH11325418A - Liquid fuel combustion apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten preheating time, eliminate white smoke and ignition odor, stabilize vaporization, reduce power consumption during combustion, and prevent the decrease in combustion amount in a short time or abnormal combustion even when a fuel containing high boiling-point elements is used, in the evaporation part of a liquid fuel combustion part. SOLUTION: This combustion apparatus is provided with first and second heat transfer parts 25a and 25b and first and second heating heaters 30a and 30b respectively on both surfaces of an approximately flat vaporization chamber 26, and the first heat transfer part 25a incorporated with the first heating heater 25a to a heat reception part is brought directly partly into a contact with a vaporization chamber 26. As a result, the temperature rise rate of a flame hole part 34 in a burner 33 is made high after starting operation, and an odor at igniting can be eliminated. Further, the thermal conductivity for the vaporization chamber 26 is made high, reducing power consumption during combustion. Meanwhile, the inside of the evaporation chamber 26 can be heated sufficiently, leaving no low-temperature part, and the evaporation of fuel is promoted for suppressing the formation of tar.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporization section of a liquid fuel combustion device.

[0002]

2. Description of the Related Art A conventional liquid fuel combustion apparatus of this type has been known as disclosed in Japanese Patent Application Laid-Open No. Hei 8-68509. This will be described with reference to FIG.

In the figure, reference numeral 1 denotes a vaporizer, a circular burner receiving seat 2 is provided on the upper portion thereof, and a nozzle portion 3 is disposed substantially at the center of the burner receiving seat 2, and between the burner receiving seat 2 and the nozzle portion 3. An opening 4 for supplying combustion air is provided. A cylindrical vaporizing chamber 6 is formed through a communication port 5 communicating with the nozzle portion 3.
And a vaporizing element 7 for promoting vaporization of fuel is provided in the vaporizing chamber 6, and a fuel supply port 8 for supplying fuel is provided at an end of the vaporizing chamber 6 on the opposite side of the communication port 5. . A U-shaped heater 9 is provided along the lower half of the burner seat 2 on the opposite side of the vaporization chamber 6 of the vaporizer 1. 10
Is mounted on the upper part of the burner receiving seat 2 together with the burner 11 having a large number of flame holes 12 formed by a mixing tube.

In the above configuration, when the vaporizer 1 is heated to a predetermined temperature by the heater 9, the liquid fuel is supplied by the fuel supply means 13 through the fuel supply port 8, and the fuel is supplied into the vaporizer 7 heated to a high temperature. Start vaporization. The vaporized gas vaporized in the vaporization chamber 6 is ejected from the nozzle 3 into the mixing pipe 10 through the communication port 5. The ejected vaporized gas sucks primary air for combustion by an ejector effect and is mixed in the mixing pipe 10 to become an air-fuel mixture, which is ejected from a flame hole 12 formed in a burner 11 and burned. Then, the combustion exhaust gas generated by the combustion is mixed with air to become warm air and used for heating or the like. When the combustion is started, the heating by the heater 9 becomes unnecessary because the vaporization chamber 6 is further heated by the heat of the combustion via the heat receiving flange 2a formed on the burner receiving seat 2, and the combustion is performed while the fuel is vaporized by its own combustion heat. It is going to continue.

[0005]

However, in the combustion apparatus described in Japanese Patent Laid-Open Publication No. Hei 8-68509, a heater 9 is used to heat the carburetor 1 at the start of combustion.
And an indirect heating system in which heat generated by the heater 9 is heated through the metal part of the vaporizer 1 to the vaporizing element 7 for vaporizing the fuel. Therefore, there is a problem that the time from when the heater 9 is energized to when the vaporizing element 7 reaches the fuel vaporizable temperature becomes long.

[0006] Further, since the vaporizing element 7 for vaporizing the fuel is cylindrical, the internal temperature is hardly increased, so that when the fuel containing the oxidized deteriorated kerosene or the high boiling point dissimilar oil component is used for a long time, the fuel is removed. It was not possible to completely vaporize, and there was a possibility that a tar component was generated in the vaporizing element 7 and clogging of the vaporizing element caused poor combustion.

[0007]

In order to solve the above-mentioned problems, the present invention provides a burner for burning a vaporized gas obtained by evaporating a liquid fuel, a nozzle at the burner end, and a liquid fuel at the other end. A substantially flat vaporizing chamber having a supply port, a first heat transfer section and a first heater for transmitting the heat of combustion of the burner to the vaporizing chamber on one flat surface of the vaporizing chamber, A second heat transfer section and a second heater are provided on a flat surface, and the burner burns directly from the first heat transfer section or the second heat transfer section to the vaporization chamber regardless of the heater. It is designed to conduct heat.

According to the above invention, the liquid fuel supplied to the heated vaporizing chamber moves and diffuses in the vaporizing chamber from the fuel supply port side, and becomes a vaporized gas while being gradually heated, and is ejected from the nozzle portion by the burner. Burn.

When the heater is energized to preheat the vaporization chamber, the heater heats the vaporization chamber and the heat transfer section.
The vaporization chamber is configured in a substantially flat shape, and the vaporization chamber is quickly heated to heat from both sides of the vaporization chamber by the first heater and the second heater arranged on both sides of the vaporization chamber at the start of energization. Thus, the time required to reach the temperature at which fuel can be vaporized in the vaporization chamber after the heater is energized at the start of combustion can be reduced.

Further, when the combustion is started, the heat of combustion heats the vaporization chamber directly from the heat transfer path via the first heat transfer section, so that even if the supply of electric power to the heater is stopped, the heat of combustion allows the vaporization chamber to be efficiently used. Good heating can be achieved, and power consumption during combustion can be significantly reduced.

Further, by providing heat transfer portions on both sides of the vaporization chamber, the heat capacity of the vaporization chamber is replenished, and a temporary decrease in the temperature of the vaporization chamber caused when fuel is supplied to the vaporization chamber is suppressed, thereby stabilizing the vaporization. Can be achieved.

Further, since the vaporizing chamber is formed to be substantially flat, it is possible to heat the inside of the vaporizing chamber to a high temperature, and it is possible to mix oxidized deteriorated kerosene or a high-boiling heterogeneous component which has been stored and oxidized for a long period of time. The fuel with an increased fuel vapor can also be vaporized, and when tarified oil or the like is used, tarification in the vaporization chamber can be suppressed.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A liquid fuel combustion apparatus according to a first aspect of the present invention includes a burner for burning a vaporized gas obtained by evaporating a liquid fuel, a nozzle at the burner end, and a liquid fuel at the other end. A substantially flat vaporizing chamber having a fuel supply port, a first heat transfer section and a first heater for transferring the combustion heat of the burner to the vaporizing chamber on one flat surface of the vaporizing chamber, and the like. A second heat transfer section and a second heater on the flat surface of the burner, wherein the burner does not pass through the heater from the first heat transfer section or the second heat transfer section to the vaporization chamber during combustion. It is designed to transfer heat directly.

According to the present invention, the liquid fuel supplied to the heated vaporization chamber moves and diffuses in the vaporization chamber from the fuel supply port side, and becomes a vaporized gas while being gradually heated, and is ejected from the nozzle portion by the burner. Burn.

When the heater is energized to preheat the vaporization chamber, the heater heats the vaporization chamber and the heat transfer section.
The vaporization chamber has a substantially flat shape, and the vaporization chamber is heated from both sides by the first heater and the second heater arranged on both sides of the vaporization chamber at the start of energization. Heating can be performed, and the time required to reach a temperature at which fuel can be vaporized in the vaporization chamber after the heater is energized at the start of combustion can be reduced.

When the combustion starts, the heat of combustion heats the vaporization chamber via the heat transfer surface. However, if a heater exists in the entire region between the heat transfer surface and the vaporization chamber, the heater becomes a thermal resistance,
The efficiency of heat transfer from the heat transfer section to the vaporization chamber is reduced. ADVANTAGE OF THE INVENTION According to this invention, it becomes possible to heat a vaporization chamber efficiently by combustion heat even if electricity supply to a heater is stopped by directly transmitting heat to a heat transfer part and a part of vaporization chamber without passing through a heater. ,
Power consumption during combustion can be significantly reduced.

Further, by providing heat transfer portions on both sides of the vaporization chamber, the heat capacity of the vaporization chamber is replenished, and a temporary decrease in temperature of the vaporization chamber caused when fuel is supplied to the vaporization chamber is suppressed, thereby stabilizing the vaporization. Can be achieved.

Further, since the vaporization chamber is formed in a substantially flat shape, it is possible to heat the inside of the vaporization chamber to a high temperature. The fuel with an increased fuel vapor can also be vaporized, and when tarified oil or the like is used, tarification in the vaporization chamber can be suppressed.

Further, the liquid fuel combustion apparatus according to a second aspect of the present invention includes a burner receiving seat on which the burner is mounted as a means for receiving the heat of combustion of the burner. The part was integrated. Then, after the start of energization, the temperature of the burner receiver integrated with the first heat transfer section is increased more quickly, and the burner mounted on the burner receiver is rapidly heated, and is discharged from the flame hole of the burner at the time of ignition. It is easy to ignite the mixed gas, and white smoke and odor at the time of ignition can be reduced. When the combustion starts, the burner seat receives the heat of combustion, and the heater is energized by directly transferring heat through the heat transfer unit and part of the heat transfer unit and the vaporization chamber without using the heater. Even if the operation is stopped, the vaporization chamber can be efficiently heated by the combustion heat, and the power consumption during combustion can be significantly reduced.

The liquid fuel combustion apparatus according to a third aspect of the present invention includes a heat receiver substantially above the burner as a means for receiving the heat of combustion of the burner, wherein the heat receiver and the first heat transfer section are provided. The structure was integrated. After the start of energization, the heat receiving portion, which is integral with the first heat transfer portion, can have a smaller heat capacity than the burner receiver, so that the temperature rise rate is high. Heat is transferred to the first heat transfer section, and the vaporization chamber is heated by the combustion heat via the first heat transfer section, so that a stable vaporized state can be obtained. Further, by providing the heat receiving portion above the burner, it is possible to efficiently receive the heat of combustion, and the power consumption during combustion can be further reduced.

Further, in the liquid fuel combustion device according to claim 4 of the present invention, either the end or the center of the vaporization chamber is in contact with the first heat transfer section. When the combustion starts, the combustion heat is received by the burner seat, and a part of the heat is passed through the first heat transfer section through the first heater.
The remaining heat is transferred directly from the end or the center of the vaporization chamber, which is in contact with the first heat transfer portion having a small thermal resistance, without passing through the heater, so that even if the power supply to the heater is stopped, the combustion heat As a result, the vaporization chamber can be efficiently heated, and the power consumption during combustion can be significantly reduced.

In the liquid fuel combustion apparatus according to a fifth aspect of the present invention, a heat dispersing plate is provided between the vaporization chamber and the first heater so that a part thereof contacts the first heat transfer section. Configuration. Then, when the combustion starts, the combustion heat is received by the burner seat, a part of the heat is passed through the first heater through the first heat transfer portion, and the remaining heat is transferred to the first heat transfer portion having the small heat resistance.
The vaporization chamber is heated via a heat dispersing plate directly in contact with the heat transfer section. The heat conducted to the heat distribution plate via the first heater has a low temperature because the first heater has a large thermal resistance. The present invention uses a heat dispersing plate having good heat conduction, diffuses the heat of a portion of the heat dispersing plate directly in contact with the first heat transfer portion to other portions, and heats the vaporizing chamber to substantially reduce the vaporizing chamber. It is possible to heat evenly, and it is also possible to vaporize altered kerosene that has been stored and oxidized for a long period of time and fuel with a high boiling point mixed with high-boiling heterogeneous components. Tar formation can be suppressed.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1) FIG. 1 is a sectional view of an essential part showing a liquid fuel combustion apparatus according to Embodiment 1 of the present invention, FIG. 2 is a top view of a vaporization section of the liquid combustion apparatus, and FIG. 4 and FIG. 5 are side cross-sectional views of the vaporizing section of the liquid combustion apparatus.

In FIG. 1 to FIG. 4, reference numeral 21 denotes a vaporizing portion, a circular burner receiving seat 22 is provided on an upper portion thereof, and a nozzle portion 23 is disposed substantially at the center of the burner receiving seat 22. An opening 24 into which combustion air flows is provided between the openings 23. Reference numeral 25a denotes a first heat transfer section,
6 and is integrally formed with the burner receiving seat 22. 25b is a second heat transfer section,
6 is provided on the lower surface. Reference numeral 26 denotes a vaporization chamber having a substantially flat shape, one end of which communicates with the nozzle 23 via a vaporized gas passage 27, and a fuel supply port 28 provided at the other end. Reference numeral 29 denotes a vaporizing element provided in the vaporizing chamber 26, and reference numeral 30a denotes a first heater provided on the upper surface of the vaporizing chamber 26, which is disposed avoiding both ends of the vaporizing chamber 26. Reference numeral 30b denotes a second heater provided on the lower surface of the vaporization chamber 26. The heaters 30a and 30b are fixed by the first heat transfer section 25a and the second heat transfer section b so as to sandwich the vaporization chamber 26 from both sides. . Reference numeral 32 denotes a mixing tube located above the nozzle portion 23 and mounted on the burner receiving seat 22, and reference numeral 33 denotes a burner provided with a large number of flame holes 34 on a lower peripheral wall. Reference numeral 35 denotes a fuel pump for supplying fuel to the vaporizing section 21, reference numeral 36 denotes a needle for opening and closing the nozzle section 23, and reference numeral 37 denotes a solenoid for driving the needle 36.

Next, the operation and operation will be described. Energize the first heater 30a and the second heater 30b,
When the vaporization chamber 26 reaches a predetermined temperature, the fuel pump 35
Is started, and fuel is supplied from the fuel supply port 28 into the vaporization chamber 26. The fuel supplied from the fuel supply port 28 into the vaporization chamber 26 is diffused and moved while being heated toward the vaporized gas passage 27 through the pores of the vaporization element 29 having a porosity. The gas is converted into a gas from a liquid and becomes a vaporized gas, and is ejected from the nozzle portion 23 via the vaporized gas passage 27. When the vaporized gas is ejected from the nozzle 23, the primary air is sucked from the opening 24 by the ejector effect and is mixed with the vaporized gas in the mixing pipe 32 and burns in the flame hole 34 through the burner 33. And during burning, the flame hole 3
The burner receiving seat 22 is heated by the flame formed in FIG. 4, and the vaporizing chamber 26 is heated through the first heat transfer portion 25a integrated with the burner receiving seat 22, so that the heating by the heaters 30a and 30b is performed during combustion. It becomes unnecessary and the vaporization combustion is sustained only by the combustion heat.

In the above configuration, when the first heater 30a is disposed on the entire surface between the first heat transfer section 25a and the vaporization chamber 26, the heat transfer area between them becomes large, and after the start of energization,
When the rate of temperature rise of the first heat transfer section 25a and the vaporization chamber 26 increases, but when the combustion heat is transferred to the vaporization chamber 26, the first heater 30a becomes thermal resistance and the heat transfer rate is significantly reduced. There is.

In the configuration of the present embodiment, the path for transmitting the combustion heat to the vaporization chamber 26 receives the heat of the flame formed by the flame hole 34 of the burner 33 by the heat receiving wall 22 a provided on the burner receiving seat 22. The received heat passes through a first heat transfer portion 25a formed integrally with the burner receiving seat 22, one portion of which passes through a first heater 30a, and the remaining heat receives a first heat transfer portion having a small thermal resistance. Directly from both ends of the vaporizing chamber 26 in direct contact with the heating section 25a, without passing through the first heater 30a,
Heat. A part of the heat is transferred from the first heat transfer section 25a to the second heat transfer section 25b, and the second heater 30b
The vaporization chamber 26 is heated via the. Therefore, the thermal resistance from the first heat transfer section 25a to the vaporization chamber 26 decreases, and the heat transfer speed increases, so that the vaporization chamber 26 is quickly heated by the combustion heat via the first heat transfer section 25a. In addition, a stable vaporization state can be obtained because the vaporization chamber 26 quickly reaches a stable temperature, and the combustion heat can be efficiently transferred, so that power consumption during combustion can be significantly reduced. .

In the process of fuel vaporization in the vaporization chamber 26, if there is a low temperature portion in the fuel diffusion passage in the vaporization chamber 26 and the built-in vaporization element 29, a part of the fuel is vaporized in the vaporization chamber. Is not completed, and the downstream nozzle portion 23
The tar generated for vaporization in the step clogs the vaporized gas ejection hole of the nozzle portion 23 and reduces the amount of combustion, but according to the configuration of the present embodiment, the vaporization chamber 26 is configured to be flat, The inside of the vaporization chamber 26 is heated to a high temperature to heat from both sides, and the fuel is supplied to the vaporization chamber 26 because no low-temperature portion is generated.
The vaporization can be completed completely within.

Further, when the vaporization chamber 26 reaches a predetermined temperature and starts fuel supply, the temperature may temporarily decrease due to the small heat capacity of the vaporization chamber 26, resulting in poor fuel vaporization. In the embodiment, the first heat transfer portion 25a is provided on one flat surface of the vaporization chamber 26, and the second heat transfer portion 25b is provided on another flat surface.
The first heat transfer portion 25a and the second heat transfer portion 25a
Due to the heat capacity of the heat transfer section 25b, this temperature drop can be suppressed and stable vaporization can be obtained.

The above-mentioned effect is further enhanced by forming a part of the second heat transfer section 25b in direct contact with both ends of the vaporizing chamber 26 in the same manner as the first heat transfer section 25a. I can roll.

Further, even in a configuration in which the second heat transfer portion 25b and the second heater 30b are omitted, the vaporization chamber 26 is flat, and therefore, compared with the structure of a conventional cylindrical vaporization chamber. It is possible to drastically reduce the temperature rise time.

FIG. 5 shows a configuration in which the first heat transfer section 25a is in direct contact with the substantially central portion of the vaporization chamber 26, and the operation is such that the first heat transfer section 25a is in direct contact with both ends of the vaporization chamber 26. And the same effect can be obtained.

The above-mentioned effect can be further enhanced by forming both ends and substantially the middle of the vaporization chamber 26 in direct contact with the first heat transfer section 25a. However, in this case, the heating time after the start of energization to the heaters 30a and 30b is slightly delayed.

(Embodiment 2) FIG. 6 is a sectional view of a main part showing a liquid fuel combustion apparatus according to Embodiment 2 of the present invention, and FIGS. 7 and 8 are partial side sectional views of a vaporization section of the liquid combustion apparatus.

In FIGS. 6 and 7, reference numeral 41 denotes a vaporizing section;
Is a substantially flat vaporizing chamber having a nozzle portion 45 at one end and a fuel supply port 46 at the other end, and a vaporizing element 47 inside.
Reference numeral 43a denotes a first heat transfer unit having a heat receiving unit 42 at one end, and a first heater 48a provided between the first heat transfer unit and the vaporization chamber 44. Reference numeral 43b denotes a second heat transfer unit, and 48b denotes a second heater, which is disposed between the vaporizing chamber 44 and both ends of the vaporizing chamber 44 while avoiding both ends. A burner 49 is provided so that the heat receiving section 42 faces substantially upward.

Next, the operation and operation will be described. Energize the first heater 48a and the second heater 48b,
When the temperature of the vaporization chamber 44 reaches a predetermined temperature, a fuel pump (not shown) is started, and fuel is supplied from the fuel supply port 46 to the vaporization chamber 4.
4 The fuel supplied from the fuel supply port 46 into the vaporization chamber 44 diffuses and moves in the pores of the vaporization element 47 having a porosity while being heated toward the nozzle part 45 side, and gradually vaporizes from the low boiling point component in the fuel. The liquid is turned into a gas and becomes a vaporized gas, which is ejected from the nozzle 45. When the vaporized gas is ejected from the nozzle portion 45, the primary air is sucked by the ejector effect and burns at the outlet of the burner 49 while being mixed with the vaporized gas in the burner 49. During the combustion, the heat receiving portion 42 is heated by the flame formed in the burner 49, and the vaporizing chamber 4 is formed via the first heat transfer portion 43 a provided integrally with the heat receiving portion 42.
4 by heating the heaters 48a, 4a during combustion.
The heating by 8b is unnecessary, and the vaporization combustion is maintained only by the combustion heat.

In the structure of the present embodiment, the heat transfer path of the combustion heat in the vaporization chamber 44 receives the heat of the flame formed by the burner 49 in the heat receiving section 42. The received heat passes through a first heat transfer section 43a, which is integrally formed with the heat receiving section 42, one part of which passes through a first heater 48a, and the remaining heat is a first heat transfer section having a small thermal resistance. Vaporization chamber 44 in direct contact with part 43a
Of the vaporization chamber 44 directly from both ends of the
Heat. A part of the heat is transferred from the first heat transfer section 43a to the second heat transfer section 43b, and the second heater 48b
The vaporization chamber 44 is heated via the above. Therefore, since the thermal resistance of the vaporization chamber 44 from the first heat transfer section 43a decreases and the heat transfer speed increases, the vaporization chamber 44 is quickly heated by the combustion heat via the first heat transfer section 43a, Since the vaporization chamber 44 can quickly reach a stable temperature, a stable vaporization state can be obtained, the combustion heat can be efficiently transferred, and the power consumption during combustion can be significantly reduced.

Since the heat receiving section 42 does not need to mount the burner 49, the heat capacity can be reduced, and the heat receiving section 42 is heated through the first heat transfer section 43a in a short time after the start of energization. You. After the start of combustion, heat received in a short time is transferred to the vaporization chamber 44 because the heat receiving section 42 is already heated, so that stable vaporization can be obtained. Further, by disposing the heat receiving section 42 above the burner 49, it is possible to efficiently receive the heat of combustion.
Can further enhance the effect obtained. Further, in the process in which the fuel is vaporized in the vaporization chamber 44, the vaporization chamber 44
If there is a low-temperature portion in the fuel diffusion passage in the built-in vaporization element 47, a part of the fuel does not complete vaporization in the vaporization chamber and is vaporized in the downstream nozzle portion 45. Although the vaporized gas ejection hole of the portion 45 is closed and the amount of combustion is reduced, according to the configuration of the present embodiment, the vaporizing chamber 44 is configured to be flat, and the inside is heated to a high temperature to heat from both sides. Since the fuel is heated and no low-temperature portion is generated, the fuel can be completely vaporized in the vaporization chamber 44.

FIG. 8 shows a configuration in which the first heat transfer section 43a is in direct contact with the substantially central portion of the vaporization chamber 44, and the operation is such that the first heat transfer section 43a is in direct contact with both ends of the vaporization chamber 44. And the same effect can be obtained.

(Embodiment 3) FIG. 9 is a partial side sectional view showing a carburetor of a liquid fuel combustion apparatus according to Embodiment 3 of the present invention.

The third embodiment differs from the first embodiment in that a heat diffusion plate 31 made of a material having a high thermal conductivity such as an alloy of copper or aluminum is provided between the first heat transfer section 25a and the vaporizing chamber 26.
Is provided. The components having the same reference numerals as those in the first embodiment have the same structure, and a description thereof will be omitted.

In the configuration of the present embodiment, the path for transmitting the combustion heat to the vaporization chamber 26 receives the heat of the flame formed by the flame hole 34 of the burner 33 by the heat receiving wall 22 a provided on the burner receiving seat 22. The received heat passes through a first heat transfer section 25a, which is formed integrally with the burner receiving seat 22, one part of which passes through a first heater 30a and a heat dispersing plate 31, and the rest of the heat passes through a heat resistance. The vaporization chamber 26 is heated through the heat dispersing plate 31 that is in direct contact with the small first heat transfer section 25a. Further, part of the heat is transferred from the first heat transfer section 25a to the second heat transfer section 25b, and heats the vaporization chamber 26 via the second heater 30b. In this heat transfer path, the first heater 30a
The vaporization chamber 26 at the portion opposite to the first heater 30a
Although the amount of heat transferred from the first heat transfer portion 26a is lower than that of the other portions due to the thermal resistance of the heat transfer portion, the heat dissipating plate 31 having good heat conduction provides the heat directly in contact with the first heat transfer portion 25a. The heat is dispersed from both ends of the dispersion plate 31 to heat the vaporization chamber 26 at a portion facing the first heater 30a.
Therefore, the temperature of the vaporization chamber 26 is almost uniformly heated, and the fuel which has been stored and oxidized for a long period of time and which has a high boiling point due to the mixing of a high boiling point heterogeneous component can be vaporized. Tar formation in the vaporization chamber can be suppressed.

[0044]

As described above, in the liquid fuel combustion apparatus according to the first aspect of the present invention, a substantially flat vaporizing chamber, and the combustion heat of the burner is applied to one flat surface of the vaporizing chamber to the vaporizing chamber. A first heat transfer section and a first heater for transferring heat, a second heat transfer section and a second heater on another flat surface, and the first heat transfer section or the second heater during combustion. At least one of the heat transfer sections is directly transferred to the vaporization chamber, so that during combustion, a portion of the heat of combustion is directly transferred through the second heat transfer section. By heating the vaporization chamber from the heating path, even if the power supply to the heater is stopped, the vaporization chamber can be efficiently heated by combustion heat, and power consumption during combustion can be significantly reduced. . Further, since the vaporization chamber is heated from both sides, the vaporization chamber can be heated quickly, and the time required for the vaporization chamber to reach a temperature at which fuel can be vaporized after electricity is supplied to the heater at the start of combustion can be reduced.
In addition, since the vaporization chamber is formed in a substantially flat shape, it is possible to heat the interior of the vaporization chamber to a high temperature, fuel vaporization is promoted, and tarification in the vaporization chamber when deteriorated oil or the like is used. Can be suppressed.

Further, the liquid fuel combustion apparatus according to a second aspect of the present invention includes a burner receiving seat on which the burner is mounted as means for receiving the heat of combustion of the burner. And a first heat transfer section and a first heater, and a second heat transfer section and a second heater on the other surface, wherein the first heat transfer section is provided during combustion. Or the second heat transfer section, the heat is directly transferred to the vaporization chamber, so that during combustion, the combustion heat is vaporized from a path where a part of the heat is directly transferred through the second heat transfer section. By heating the chamber, it is possible to efficiently heat the vaporization chamber with combustion heat even when the power supply to the heater is stopped, greatly reducing the power consumption during combustion and mounting it on the burner seat. The burner that is placed is heated quickly, and from the flame hole of the burner at the time of ignition The ignition of exits for premixed gas to facilitate, it is possible to reduce white smoke and odors during ignition.

In the liquid fuel combustion apparatus according to a third aspect of the present invention, a heat receiver is provided substantially above the burner as means for receiving the heat of combustion of the burner, and the heat receiver and the first heat transfer section are provided. The first heat transfer section and the first heat transfer section are integrated with each other.
A second heat transfer portion and a second heater on the other surface, and the first heat transfer portion or the second heat transfer portion during combustion.
Since the heat is directly transferred from the heat transfer section to the vaporization chamber, the heat capacity of the heat receiving section is small, the temperature rising speed is fast, and after the start of combustion, a stable vaporized state can be obtained in a short time, and By providing the portion above the burner, it is possible to efficiently receive combustion heat, and power consumption during combustion can be further reduced.

Further, the liquid fuel combustion apparatus according to a fourth aspect of the present invention includes a heat receiver substantially above the burner as a means for receiving the heat of combustion of the burner, wherein the heat receiver and the first heat transfer section are provided. Since the first heat transfer section at the end or the center of the vaporization chamber is in direct contact with the first heat transfer section, the combustion heat is transmitted through the second heat transfer section during combustion. By heating the vaporization chamber from the path through which the part directly conducts heat, it is possible to efficiently heat the vaporization chamber with combustion heat even when the power supply to the heater is stopped, greatly reducing power consumption during combustion. be able to. Further, since the vaporization chamber is heated from both sides, the vaporization chamber can be quickly heated, and the time required to reach the temperature at which the vaporization chamber can vaporize fuel after the heater is energized at the start of combustion can be reduced. In addition, since the vaporization chamber is formed in a substantially flat shape, it is possible to heat the interior of the vaporization chamber to a high temperature, and the vaporization of fuel is promoted. Can be suppressed.

Further, in the liquid fuel combustion apparatus according to claim 5 of the present invention, a heat dispersing plate is provided between the vaporization chamber and the first heater so that a part thereof is in contact with the first heat transfer section. During the combustion, the heat of the portion directly in contact with the first heat transfer portion is diffused to the other portions by the heat dissipating plate during combustion, and the vaporization chamber is heated substantially uniformly by heating the vaporization chamber. It is possible to vaporize the fuel whose boiling point has been increased due to the mixture of high-boiling high temperature and oxidized deteriorated kerosene which has been stored and oxidized for a long period of time, and suppresses tarification in the vaporization chamber when the deteriorated oil is used. can do.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a liquid fuel combustion device according to a first embodiment of the present invention.

FIG. 2 is a top view of a carburetor of the liquid fuel combustion device.

FIG. 3 is a bottom view of a carburetor of the liquid fuel combustion device.

FIG. 4 is a side view of a carburetor of the liquid fuel combustion device.

FIG. 5 is a side view of a carburetor of the liquid fuel combustion device.

FIG. 6 is a longitudinal sectional view of a main part of a liquid fuel combustion device according to a second embodiment of the present invention.

FIG. 7 is a side view of a carburetor of the liquid fuel combustion device.

FIG. 8 is a longitudinal sectional view of a main part of a liquid fuel combustion device according to a second embodiment of the present invention.

FIG. 9 is a side view of a carburetor of the liquid fuel combustion device.

FIG. 10 is a longitudinal sectional view of a main part of a conventional liquid fuel combustion device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 Vaporization part 22 Burner receiving seat 23 Nozzle part 25 Heat transfer part 25a First heat transfer part 25b Second heat transfer part 26 Vaporization chamber 28 Fuel supply port 29 Vaporization element 30a First heater 33 Burner 30b Second Heater

Claims (5)

[Claims] A burner for burning a vaporized gas obtained by vaporizing a liquid fuel; a substantially flat vaporizing chamber having a nozzle at the burner end and a fuel supply port for the liquid fuel at the other end; A first heat transfer portion and a first heater for transferring the combustion heat of the burner to the vaporization chamber on one flat surface of the chamber, and a second heat transfer portion and a second heater on the other flat surface; A liquid fuel combustion device that is configured to directly transfer heat from the first heat transfer section or the second heat transfer section to the vaporization chamber without using the heater during combustion of the burner. 2. The liquid fuel combustion according to claim 1, further comprising a burner receiving seat on which the burner is mounted as means for receiving the heat of combustion of the burner, wherein the burner receiving seat and the first heat transfer portion are integrated. apparatus. 3. The liquid fuel combustion apparatus according to claim 1, further comprising a heat receiver substantially above the burner as a means for receiving the heat of combustion of the burner, wherein the heat receiver and the first heat transfer unit are integrated. 4. The liquid fuel combustion apparatus according to claim 1, wherein one of an end and a center of the vaporization chamber is in direct contact with the first heat transfer section. 5. The liquid fuel combustion apparatus according to claim 4, wherein a heat dispersing plate is provided between the vaporization chamber and the first heater so that a part thereof is in contact with the first heat transfer section.