JP2000337611A - Liquid fuel combustion device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To shorten preheating time, stabilize vaporization and prevent lowering of combustion rate and occurrence of abnormal combustion in a short time even when a fuel containing high boiling point components is used. SOLUTION: A substantially flat vaporizing chamber 26 consists of a burner stand 22 which is integrated therein being mounted with a burner 30 with a heater 28 being held therein, and a heat transfer portion 22b whose thickness at the side of a fuel supply port 25 is thinner than that at the side of a nozzle 23. Specifically, when starting operation, the entire surface of the chamber 26 are directly heated to accelerate temperature rise. At the time of combustion, the inner portion of the chamber 26 can be heated to have a high temperature, and therefore, fuel whose boiling point has become high can be vaporized, and thus when deteriorated oil is used, generation of tar in the chamber 26 can be suppressed. Further, as temperature gradient is formed in the chamber 26 to raise temperature from an entrance of fuel toward its exit, generation of tar can be scattered, and therefore decrease of combustion rate can be restrained.

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.

[0003] In FIG. 13, reference numeral 1 denotes a vaporizer, a circular burner receiving seat 2 is provided at an upper portion thereof, and a nozzle portion 3 is arranged at substantially the center of the burner receiving seat 2. An opening 4 for supplying combustion air is provided between the nozzle section 3 and the nozzle section 3. Then, a cylindrical vaporizing chamber 6 is formed through a communication port 5 communicating with the nozzle section 3, and a vaporizing element 7 for promoting vaporization of fuel is provided in the vaporizing chamber 6, and a vaporizing element 7 on the opposite side of the nozzle section 3. A fuel supply port 8 for supplying fuel is provided at the end. A U-shaped heater 9 is provided along the lower half of the burner receiving seat 2 on the opposite side of the vaporizing chamber 6 of the vaporizer 1.
Reference numeral 10 denotes a mixing tube mounted on an upper portion of the burner receiving seat 2 together with a burner 12 having a plurality of flame holes 11 formed therein.

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 in the vaporization element 7 heated to a high temperature. The fuel starts to vaporize. 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 from the opening 4 by an ejector effect, and mixes the primary air for combustion.
The fuel gas is mixed in the chamber and becomes an air-fuel mixture, and is ejected from a flame hole 11 formed in a burner 12 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 heat of combustion is used to heat the vaporization chamber via the heat receiving flange 2a formed integrally with the burner receiving seat 2, so that the heating by the heater 9 becomes unnecessary, and the fuel is vaporized by its own combustion heat. While continuing to burn.

[0005]

However, in the combustion apparatus having the structure described in Japanese Patent Application Laid-Open No. Hei 8-68509, the heater 9 is used to heat the carburetor 1 at the start of combustion. The heat generated by the heater 9 heats the vaporizing element 7 for vaporizing the fuel via the metal part of the vaporizer 1. Since the vaporizing element 7 for vaporizing the fuel is cylindrical, the vaporizing element 7 is heated. There is a problem that the time required for the temperature of the central portion to reach the vaporizable temperature becomes long. Also,
Since the vaporizing element 7 that vaporizes the fuel also during combustion is cylindrical, the internal temperature is hard to rise and the fuel is completely stored when a fuel containing a oxidized deteriorated kerosene or a high-boiling oil containing a different oil component is stored for a long time. Therefore, there is a possibility that a tar component is generated in the vaporizing element 7 and a combustion failure such as a decrease in the combustion amount due to clogging of the vaporizing element occurs.
Therefore, an object of the present invention is to solve the above problems.

[0006]

According to the present invention, there is provided a burner for burning a vaporized gas obtained by evaporating a liquid fuel, and a heat receiving means for receiving heat of combustion of the burner.
A heat transfer section connected to one end of the heat receiving means, a heating heater, a nozzle section at one end, and a substantially flat vaporization chamber having a fuel supply port for liquid fuel at the other end; The wall surface is configured by the heat transfer section, and the thickness of the wall surface on the fuel supply port side of the vaporization chamber is configured to be smaller than the thickness of the wall surface on the nozzle section side.

According to the above invention, when the heating heater is energized to preheat the vaporization chamber, the heating heater heats the vaporizer, and the heat transfer portion of the vaporizer constituting the wall surface of the vaporization chamber. The vaporization chamber can be directly heated from above, and because the vaporization chamber is configured to be almost flat, the vaporization chamber can be quickly heated to the center by transferring heat from the heat transfer section to the vaporization chamber on a wide heat transfer surface. Thus, the time required for the vaporization chamber to reach the temperature at which the fuel vaporizes to the center can be shortened after energizing the heating heater at the start of combustion. Further, when the combustion is started, the liquid fuel supplied to the heated vaporization chamber moves and diffuses in the vaporization chamber from the fuel supply port side, becomes a vaporized gas while being gradually heated, and is ejected from the nozzle portion and burned by the burner. I do. The heat of combustion directly heats the vaporization chamber from the burner seat through the heat transfer section constituting the wall of the vaporization chamber. Since the vaporization chamber is configured to be substantially flat, the interior of the vaporization chamber can be heated to a high temperature, and the thickness of the wall on the fuel supply port side of the vaporization chamber is reduced by the thickness of the wall on the nozzle side. Due to the thinner structure, the temperature on the fuel supply port side of the vaporization chamber is lower than the temperature on the nozzle part side, and the temperature gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle part side. Vaporization starts from the low-boiling component of the fuel supplied to the chamber, and the high-boiling component of the fuel is vaporized as it moves to the nozzle section side, and vaporizes almost from the fuel supply port in the vaporization chamber to the nozzle section side. Therefore, it is possible to vaporize the fuel whose boiling point has been increased due to the mixture of the deteriorated kerosene which has been stored and oxidized for a long period of time and the high-boiling point heterogeneous component, and the tar in the vaporization chamber when the deteriorated oil or the like is used. , And is generated by being dispersed over almost the entire region, it is possible to suppress a decrease in the amount of combustion due to clogging in the vaporization chamber.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The object of the present invention can be attained by implementing the constitutions described in the respective claims as embodiments. That is, 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 liquid fuel, heat receiving means for receiving the heat of combustion of the burner, and one end of the heat receiving means. A heat transfer section, a heating heater, a nozzle section at one end, and a substantially flat vaporization chamber having a fuel supply port for liquid fuel at the other end, wherein a wall of the vaporization chamber is connected to the heat transfer section. And the thickness of the wall surface on the fuel supply port side of the vaporization chamber is smaller than the thickness of the wall surface on the nozzle portion side.

When the heating heater is energized to preheat the vaporization chamber, the heating heater heats the vaporizer, and the vaporization chamber is formed from the heat transfer section of the vaporizer constituting the wall surface of the vaporization chamber. Because it can be directly heated from the whole surface and the vaporization chamber is configured to be almost flat, the vaporization chamber can be quickly heated to the center by transferring heat from the heat transfer section to the vaporization chamber with a wide heat transfer surface, The time required for the vaporization chamber to reach the temperature at which the fuel vaporizes to the center can be shortened after the heating heater is energized at the start of combustion. Further, when the combustion is started, the liquid fuel supplied to the heated vaporization chamber moves and diffuses in the vaporization chamber from the fuel supply port side, becomes a vaporized gas while being gradually heated, and is ejected from the nozzle portion and burned by the burner. I do. The heat of combustion directly heats the vaporization chamber from the burner seat through the heat transfer section constituting the wall of the vaporization chamber. Since the vaporization chamber is formed in a flat shape, it is possible to heat the vaporization chamber to a high temperature up to the central portion thereof, and to reduce the thickness of the fuel supply port side wall thickness of the vaporization chamber to the thickness of the nozzle wall side. Due to the thinner structure, the temperature on the fuel supply port side of the vaporization chamber is lower than the temperature on the nozzle part side, and the temperature gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle part side. Vaporization starts from the low-boiling component of the fuel supplied to the chamber, and the high-boiling component of the fuel is vaporized as it moves to the nozzle section side, and vaporizes almost from the fuel supply port in the vaporization chamber to the nozzle section side. Therefore, oxidized deteriorated kerosene which has been stored and oxidized for a long period of time and fuel having a high boiling point mixed with a high-boiling point heterogeneous component can be vaporized, and tar in the vaporization chamber is vaporized when the modified oil is used. Since the gas is dispersed and generated in almost the entire area of the chamber, a decrease in the combustion amount due to clogging in the vaporization chamber can be suppressed.

Further, a liquid fuel combustion apparatus according to a second aspect of the present invention includes a burner for burning a vaporized gas obtained by vaporizing a liquid fuel, and a heat receiving means for receiving the heat of combustion of the burner.
A heat transfer part connected to one end of the heat receiving means, a carburetor cap provided separately from the carburetor provided at one end of the heat transfer part, a heating heater, a nozzle part at one end, and a liquid fuel at the other end A vaporization chamber having a substantially flat shape having a fuel supply port, wherein the wall of the vaporization chamber on the side of the nozzle portion is the heat transfer section, and the wall of the vaporization chamber on the side of the fuel supply port is the cap. Configured.
When the heating heater is energized and the vaporization chamber is preheated, the vaporization chamber can be heated by the heating heater, and the vaporization chamber can be directly heated from the heat transfer portion of the vaporizer constituting the wall surface of the vaporization chamber. Since the vaporization chamber has a substantially flat shape, the vaporization chamber can be quickly heated to the center by transferring heat from the heat transfer section to the vaporization chamber on a wide heat transfer surface, and the heating heat is applied at the start of combustion. The time required for the vaporization chamber to reach the temperature at which fuel vaporization can reach the center after the power is supplied to the fuel cell can be shortened. Further, during combustion, the combustion heat directly heats the vaporization chamber from the burner seat through the heat transfer section constituting the wall surface of the vaporization chamber. And since the vaporization chamber is configured in a flat shape, it is possible to heat the interior of the vaporization chamber to a high temperature, and the wall of the vaporization chamber on the side of the fuel supply port is provided by a vaporizer cap separate from the heat transfer section. Because the temperature on the fuel supply port side of the vaporization chamber is lower than the temperature on the nozzle side, and the temperature gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle In addition to storing and oxidizing altered kerosene and high-boiling heterogeneous components, fuel with a high boiling point can be vaporized,
When the deteriorated oil or the like is used, tar in the vaporization chamber is dispersed and generated in almost the entire area of the vaporization chamber, so that a decrease in the combustion amount due to clogging in the vaporization chamber can be suppressed.

Further, in the liquid fuel combustion device according to claim 3 of the present invention, the wall thickness of the vaporization chamber formed by the vaporizer cap is made smaller than the wall thickness of the vaporization chamber formed by the heat transfer section. Then, since the thermal resistance of the vaporizer cap increases, the temperature of the vaporization chamber on the fuel supply port side constituted by the vaporizer cap during combustion increases the temperature of the vaporization chamber on the nozzle section side constituted by the heat transfer section. The temperature is lower than the temperature, the temperature on the fuel supply port side of the vaporization chamber is lower than the temperature on the nozzle section side, and the temperature gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle section, so that the degraded oil etc. When used, the tar in the vaporization chamber is dispersed and generated in almost the entire area of the vaporization chamber, so that clogging in the vaporization chamber can be suppressed. Further, when energization of the heating heater is started to heat the vaporizer, the thickness of the vaporizer cap is small, so that the heat capacity of the entire vaporizer is reduced, and the rate of temperature rise of the vaporizer can be increased.

Further, in the liquid fuel combustion apparatus according to claim 4 of the present invention, the carburetor cap is formed of a material having a lower thermal conductivity than the material forming the heat transfer section. Then, since the thermal resistance of the vaporizer cap increases, the temperature of the vaporization chamber on the fuel supply port side constituted by the vaporizer cap during combustion increases the temperature of the vaporization chamber on the nozzle section side constituted by the heat transfer section. The temperature is lower than the temperature, the temperature on the fuel supply port side of the vaporization chamber is lower than the temperature on the nozzle section side, and the temperature gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle section, so that the degraded oil etc. When used, the tar in the vaporization chamber is dispersed and generated in almost the entire area of the vaporization chamber, so that clogging in the vaporization chamber can be suppressed.

According to a fifth aspect of the present invention, in the liquid fuel combustion apparatus, the means for receiving the heat of combustion of the burner includes a heat transfer section having a burner receiving seat on which the burner is mounted. And integrated. Then, after the heating heater is energized, the burner placed on the heated burner receiving seat is heated quickly, and the premixed gas ejected from the flame hole of the burner at the time of ignition is discharged. Ignition can be facilitated, and white smoke and odor at the time of ignition can be reduced. Further, when the combustion starts, the combustion heat directly heats the vaporization chamber from the burner receiving seat from a wide area through the heat transfer portion constituting the flat wall of the vaporization chamber. Therefore, the inside of the vaporization chamber can be heated to a high temperature.

In a liquid fuel combustion apparatus according to a sixth aspect of the present invention, the heating heater is bent in a U-shape below the burner receiving seat so as to extend along about a half circumference of the burner receiving seat. Was configured. Since the heating density of the heating heater in the vicinity of the burner mounting surface of the burner receiving seat is increased, the heating heater is energized to be placed on the burner receiving seat when preheating the vaporization chamber. Bar that is placed
As a result, the premixed gas ejected from the burner flame hole is easily ignited at the time of ignition, and white smoke and odor at the time of ignition can be reduced.

In a liquid fuel combustion apparatus according to a seventh aspect of the present invention, the heating heater is bent in a U-shape below the burner receiving seat so as to extend along about a half circumference of the burner receiving seat. At the same time, it was formed in a substantially straight line in the vicinity of the heat transfer section and along the heat transfer section. When the heating heater is energized to preheat the vaporization chamber, the heat transfer section is heated by the heating heater at the same time as the vicinity of the burner receiving surface of the burner receiving seat, so that the wall surface of the vaporization chamber is heated. The time required for the vaporization chamber to reach the temperature at which fuel can be vaporized can be reduced by promoting the temperature rise of the heat transfer section constituting the heat transfer section, and the burner mounted on the burner receiving seat is also heated, so that the burner is ignited during ignition. -It is possible to easily ignite the premixed gas ejected from the flame hole of the nozzle, and to reduce white smoke and odor at the time of ignition. In addition, a single heating heater can simultaneously heat the burner receiving seat and the heat transfer section, so that the number of parts can be reduced.

Further, the liquid fuel combustion apparatus according to claim 8 of the present invention has a configuration in which the heat generation density of the substantially linear portion of the heating heater is higher than that of the U-shaped portion. When the heating heater is energized to preheat the vaporization chamber, the heat transfer portion is heated by the high heat density heating heater at the same time as the vicinity of the burner receiving surface of the burner receiving seat. The time required for the vaporization chamber to reach the fuel vaporizable temperature can be further shortened by further promoting the temperature rise of the heat transfer portion constituting the wall surface, and the burner mounted on the burner receiving seat is also heated, It is possible to easily ignite the premixed gas ejected from the burner hole of the burner at the time of ignition, and to reduce white smoke and odor at the time of ignition.

[0017]

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 longitudinal sectional view of a main part of a liquid fuel combustion apparatus according to Embodiment 1 of the present invention, FIG. 2 is a top view of a carburetor of the liquid fuel combustion apparatus, and FIG. FIG. 4 is a partial cross-sectional side view of the carburetor of the liquid combustion device.

1 to 4, reference numeral 21 denotes a vaporizer, which is provided with a circular burner receiving seat 22 at an upper portion thereof, and a nozzle portion 23 is disposed at substantially the center of the burner receiving seat 22 to receive a burner. An opening 24 through which combustion air flows is provided between the seat 22 and the nozzle portion 23. 22a is a heat transfer part and a burner receiving seat 22
The thickness on the side of the fuel supply port 25 is thinner than that on the side of the nozzle section 23. 26 is a vaporization chamber, which constitutes a wall surface with a heat transfer section 22b, one end of which communicates with the nozzle section 23,
The other end is provided with a fuel supply port 25. 27 is a vaporization chamber 26
It is a vaporization element built in. Numeral 28 denotes a heating heater, which is bent below the burner receiving seat 22 in a U-shape so as to follow about a half circle of the circular shape of the burner receiving seat 22 and is held on the burner receiving seat. . Reference numeral 29 denotes a bar located above the nozzle 23.
The mixing tube 30 mounted on the corner receiving seat 22 is a burner provided with a large number of flame holes 31 on the lower peripheral wall. Reference numeral 32 denotes a fuel pump for supplying fuel to the vaporization chamber 26, reference numeral 33 denotes a needle for opening and closing the nozzle 23, and reference numeral 34 denotes a solenoid for driving the needle 33.

Next, the operation and operation will be described. When the heating heater 28 is energized and the vaporization chamber 26 reaches a predetermined temperature, the fuel pump 32 is started and fuel is supplied to the fuel supply port 25.
From the vaporization chamber 26. The fuel supplied from the fuel supply port 25 into the vaporization chamber 26 diffuses and moves while heating toward the nozzle portion 23 inside the pores of the vaporization element 27 which is built in the vaporization chamber 26 and has a low boiling point. Nozzle 2
It gushes from 3. When the vaporized gas is ejected from the nozzle portion 23, the primary air is sucked from the opening portion 24 by the ejector effect and mixed with the vaporized gas in the mixing pipe 29 and burns in the flame hole portion 31 through the burner 30 while mixing. I do. During combustion, the flame formed in the flame hole portion 31 heats the heat receiving wall 22b of the burner receiving seat 22, and heats the vaporizing chamber 26 via the heat transfer portion 22a integrated with the burner receiving seat 22. As a result, during the combustion, the heating by the heating heater 28 becomes unnecessary, and thereafter, the vaporization combustion is continued only by the combustion heat.

When the heater 28 is energized to preheat the vaporization chamber 26, the burner seat 22 holding the heater 28 by the heater 28 and the burner seat 22 The heat transfer section 22a formed integrally is heated. Then, the vaporization chamber 26 is heated by the heat directly transmitted from the heat transfer section 22a constituting the outer wall surface. During this heating, the vaporization chamber 2
6 is formed in a flat shape, so that it is different from a cylindrical shape.
6 can be quickly heated, and the time required for the vaporization chamber 26 to reach a temperature at which fuel can be vaporized after the heating heater is energized at the start of combustion can be reduced. Further, since the burner 30 is placed on the burner receiving seat 22 heated by the heating heater 28, the burner 30 is quickly heated by the heat transfer from the burner receiving seat 22, and the burner 30 is ignited at the time of ignition. It is possible to easily ignite the premixed gas ejected from the flame hole 31 and reduce white smoke and odor at the time of ignition.

In the process of vaporizing the fuel 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 27, a part of the fuel is vaporized in the vaporization chamber 26. Vaporization element 2
7 may be clogged, or the nozzle portion 23 on the downstream side may be clogged.
In some cases, the tar generated by the vaporization may block the vaporized gas ejection holes of the nozzle portion 23 and reduce the amount of combustion. In the configuration of the present embodiment, the path for transferring the combustion heat to the vaporization chamber 26 is a path for transferring the heat of the flame formed by the flame hole 31 of the burner 30.
The heat is received by a heat receiving wall 22 b provided on the receiving seat 22. The received heat is transferred to the heat transfer section 2 integrally formed with the burner receiving seat 22.
Through 2a, the vaporization chamber 26 is directly heated from the entire surface. Since the vaporization chamber 26 has a substantially flat configuration, it is heated to a high temperature up to the center of the vaporization chamber 26, and the fuel can completely complete vaporization in the vaporization chamber 26 because no low-temperature part is generated. it can. During combustion, the fuel supply port 25 of the vaporization chamber 26 is used.
If the temperature on the side is higher than the vaporization temperature of the fuel, the tar component generated because the fuel is rapidly vaporized in the vicinity of the fuel supply port 25 is concentrated and accumulated in this portion, obstructing the fuel supply and reducing the combustion amount. Is generated. In the configuration of the present embodiment, since the thickness of the heat transfer portion 22a constituting the wall surface of the vaporization chamber 26 on the fuel supply port 25 side is reduced, the amount of heat transferred from the heat receiving portion 22b is reduced, and the fuel supply port 25 side , A temperature gradient is formed in which the temperature in the vaporization chamber 26 gradually increases from the fuel supply port 25 toward the nozzle portion 23. Accordingly, in the supplied fuel, the low-boiling components are vaporized from the fuel supply port 25 side, and the high-boiling components are gradually vaporized toward the nozzle portion 23 side, so that the fuel is vaporized in almost the entire region of the vaporization chamber 26. The tar is dispersed and generated in the vaporization chamber 26, so that it hardly hinders the supply of fuel. Further, since the wall surface of the vaporization chamber 26 is constituted by the heat transfer section 22a, the heat transfer section 2
2 can be heated without causing heat transfer loss to the vaporization chamber 26, and the combustion heat can be effectively used for vaporization. Electricity can be achieved.

(Embodiment 2) FIG. 5 is a longitudinal sectional view of a main part of a liquid fuel combustion apparatus according to Embodiment 2 of the present invention, FIG. 6 is a top view of a vaporizer of the liquid fuel combustion apparatus, and FIG. FIG. 8 is a bottom sectional view of the carburetor of the fuel combustion device, and FIG. 8 is a partial side sectional view of the carburetor of the liquid combustion device.

The second embodiment differs from the first embodiment in that
The point is that the wall surface of the vaporization chamber 26 on the side of the fuel supply port 25 is constituted by the heat transfer section 22a and the separate vaporizer cap 22c.

In FIGS. 4 to 8, reference numeral 21 denotes a vaporizer, which is provided with a circular burner receiving seat 22 on the upper portion thereof, and a nozzle portion 23 is arranged substantially at the center of the burner receiving seat 22 to receive a burner. An opening 24 through which combustion air flows is provided between the seat 22 and the nozzle portion 23. 22a is a heat transfer part and a burner receiving seat 22
And a wall surface of the vaporization chamber 26 on the nozzle portion 23 side. A vaporizer cap 22c constitutes a wall surface on the fuel supply port 25 side of the vaporization chamber 26, and the heat transfer portion 22a and the vaporizer cap 22c are joined by brazing or the like. One end of the vaporization chamber 26 communicates with the nozzle section 23, and the other end is provided with a fuel supply port 25. Reference numeral 27 denotes a vaporizing element built in the vaporizing chamber 26. Numeral 28 is a heating heater and a burner receiving seat 22.
Is bent in a U-shape along a substantially half circumference of the circular shape of the burner receiving seat 22 and is held on the burner receiving seat. 2
9 is a mixing tube located above the nozzle portion 23 and placed on the burner receiving seat 22, and 30 is a burner provided with a large number of flame holes 31 on the lower peripheral wall. 32 is a fuel pump for supplying fuel to the carburetor 21, 33 is a needle for opening and closing the nozzle 23,
34 is a solenoid for driving the needle 33.

In the structure of this embodiment, the heating heater 28
When the heater is energized to preheat the vaporization chamber 26, the burner receiving seat 22 enclosing the heating heater 28 by the heating heater 28 and the heat transfer integrally formed with the burner receiving seat 22 are provided. Part 22
a, Heat the vaporizer cap 22c. And vaporization room 2
6 is heated by the heat directly transmitted from the heat transfer portion 22a constituting the wall surface. During this heating, the inside of the vaporization chamber 26 can be quickly heated because the vaporization chamber 26 is formed in a flat shape, and the inside of the vaporization chamber 26 is vaporized by supplying electricity to the heating heater at the start of combustion. The time to reach the possible temperature can be reduced. Further, since the burner 30 is placed on the burner receiving seat 22 heated by the heating heater 28, the burner 30 is quickly heated by the heat transfer from the burner receiving seat 22.
It is possible to easily ignite the premixed gas ejected from the flame hole portion 31 of the nozzle 30 and reduce white smoke and odor at the time of ignition.

At the time of combustion, the path for transferring the heat of combustion to the vaporization chamber 26 is a heat receiving wall 22b provided on the burner receiving seat 22 with the heat of the flame formed by the flame hole 31 of the burner 30. To receive heat. The received heat heats the vaporizing chamber 26 through the heat transfer portion 22a and the vaporizer cap 22c which are integrally formed with the burner receiving seat 22. Therefore, since the substantially flat vaporization chamber 26 is heated from both sides, the inside of the vaporization chamber 26 is heated to a high temperature, and the fuel is completely vaporized in the vaporization chamber 26 because no low-temperature portion is generated. Can be. Further, in the configuration of the present embodiment, since the wall surface of the vaporization chamber 26 on the side of the fuel supply port 25 is constituted by the heat transfer portion 22a and the separate vaporizer cap 22c, the amount of heat transfer from the heat receiving portion 22b is reduced. The temperature on the side of the fuel supply port 25 decreases and the vaporization chamber 2
The temperature inside 6 forms a temperature gradient that gradually increases from the fuel supply port 25 toward the nozzle portion 23. Therefore, the temperature in the vaporization chamber 26 is changed from the fuel supply port 25 to the nozzle 23.
A temperature gradient is formed that gradually rises toward the side. In addition, the thickness of the vaporizer cap 22c is made thinner than the heat transfer portion 22a, and the vaporizer cap 22c is made of a material having a low thermal conductivity such as stainless steel, so that the temperature gradient of the vaporization chamber 26 can be easily reduced. It is possible to set an appropriate temperature. Further, since the wall surface of the vaporization chamber 26 is constituted by the heat transfer section 22a, it is possible to heat the heat without loss of heat transfer from the heat transfer section 22 to the vaporization chamber 26, and to effectively vaporize combustion heat. Therefore, it is not necessary to supply electricity to the heating heater 28 during combustion, and power can be saved.

(Embodiment 3) FIG. 9 is a sectional view showing a main part of a liquid fuel combustion apparatus according to Embodiment 3 of the present invention, FIG. 10 is a top view of a carburetor of the liquid fuel combustion apparatus, and FIG. FIG. 12 is a side partial cross-sectional view of the carburetor of the liquid fuel combustion device.

The third embodiment differs from the second embodiment in that the heating heater 28a is bent in a U-shape along the burner receiving seat 22 below the burner receiving seat 22, and the heat transfer portion is provided. The point is that it is configured linearly in the vicinity of the heat transfer portion 22a in the vicinity of the heat transfer portion 22a.

The parts having the same reference numerals as those of the second embodiment have the same structure, and duplicate description will be avoided.

In the configuration of the third embodiment, the heating heater 28
a to heat the vaporization chamber 26 by applying a current to
a heats the burner receiving seat 22 and the heat transfer portion 22a, and further heats the flat vaporizing chamber 26.
Since a is arranged along the heat transfer section 22a together with the burner receiving seat 22, the heating of the heat transfer section 22a constituting the wall surface of the vaporization chamber 26 is promoted. The time required for the inside of the vaporization chamber 26 to reach the temperature at which fuel can be vaporized can be shortened, and the burner 30 mounted on the burner receiving seat 22 is quickly heated, and the flame hole of the burner 30 is ignited at the time of ignition. It is possible to easily ignite the premixed gas ejected from the section 31 and reduce white smoke and odor at the time of ignition.

The heating rate of the heat transfer section 22a can be increased by increasing the heat generation density of the linear section of the heating heater 28a higher than that of the U-shaped section. Can be further enhanced.

[0033]

As described above, the liquid fuel combustion apparatus according to the first aspect of the present invention includes a burner for burning a vaporized gas obtained by evaporating liquid fuel, and a heat receiving device for receiving the heat of combustion of the burner. Means, a heat transfer section connected to one end of the heat receiving means, a heating heater, a nozzle section at one end, and a substantially flat vaporizing chamber having a fuel supply port for liquid fuel at the other end, The wall surface of the vaporization chamber is formed by the heat transfer section, and the thickness of the wall surface on the fuel supply port side of the vaporizer is configured to be smaller than the thickness of the wall surface on the nozzle portion side. Because the vaporization chamber can be directly heated from the heat transfer section of the vaporizer, and because the vaporization chamber has a generally flat shape, heat is transferred from the heat transfer section into the vaporization chamber with a wide heat transfer surface, so that the vaporization chamber is centered. The heater can be heated as quickly as possible. Vaporization chamber can reduce the time to reach the fuel vaporizable temperature to center. In addition, during the combustion, the vaporization chamber is configured in a flat shape, so that the interior of the vaporization chamber can be heated to a high temperature. Since the fuel can be vaporized and the thickness of the wall on the fuel supply port side of the vaporization chamber is configured to be thinner than the thickness of the wall on the nozzle section side, the temperature of the fuel supply port side of the vaporization chamber becomes lower than the nozzle section side. Since the temperature is lower than the temperature and gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle, the tar in the vaporization chamber is dispersed over almost the entire area of the vaporization chamber when the deteriorated oil is used. Because of the generation, a decrease in the amount of combustion due to clogging in the vaporization chamber can be suppressed.

Further, a liquid fuel combustion apparatus according to a second aspect of the present invention includes a burner for burning a vaporized gas obtained by vaporizing a liquid fuel, and a heat receiving means for receiving the heat of combustion of the burner.
A heat transfer portion connected to one end of the heat receiving means, a carburetor cap separate from the carburetor provided at one end of the heat transfer portion, a heating heater, a nozzle portion at one end, and a liquid fuel at the other end A vaporizing chamber having a substantially flat shape and having a fuel supply port, wherein the wall of the vaporization chamber on the nozzle side is the heat transfer chamber, and the wall of the vaporization chamber on the fuel supply port side is the vaporizer cap. When the heating heater is energized to preheat the vaporization chamber, the vaporizer is heated by the heating heater and vaporized from the heat transfer section of the vaporizer that constitutes the wall of the vaporization chamber. Since the chamber can be directly heated and the vaporization chamber is configured to be approximately flat, the vaporization chamber can be quickly heated to the center by transferring heat from the heat transfer section to the vaporization chamber on a wide heat transfer surface, When the heating heater is energized at the start of combustion, the vaporization chamber reaches the temperature at which fuel vaporization can reach the center. Time can be shortened. In addition, during combustion, since the vaporization chamber is configured in a flat shape, the interior of the vaporization chamber can be heated to a high temperature. The vaporized fuel can also be vaporized, and the wall on the fuel supply port side of the vaporization chamber is composed of the heat transfer section and a separate carburetor cap. Side temperature, gradually increasing from the fuel supply port side of the vaporization chamber toward the nozzle side,
When the deteriorated oil or the like is used, tar in the vaporization chamber is dispersed and generated in almost the entire area of the vaporization chamber, so that a decrease in the combustion amount due to clogging in the vaporization chamber can be suppressed.

Further, in the liquid fuel combustion apparatus according to claim 3 of the present invention, the wall thickness of the vaporization chamber formed by the vaporizer cap is made smaller than the wall thickness of the vaporization chamber formed by the heat transfer section. Therefore, because the thermal resistance of the vaporizer cap is increased, during combustion, the temperature of the vaporization chamber on the side of the fuel supply port formed by the vaporizer cap becomes lower than the temperature of the vaporization chamber on the nozzle side formed by the heat transfer section. The temperature is lower than the temperature, the temperature on the fuel supply port side of the vaporization chamber is lower than the temperature on the nozzle section side, and the temperature gradually increases from the fuel supply port side of the vaporization chamber toward the nozzle section, so that the degraded oil etc. When used, the tar in the vaporization chamber is dispersed and generated in almost the entire area of the vaporization chamber, so that a decrease in the combustion amount due to clogging in the vaporization chamber can be suppressed. Further, when the heater is energized and the vaporizer is heated by heating, the heat capacity of the entire vaporizer is reduced because the thickness of the vaporizer cap is small, and the temperature rise rate of the vaporizer can be increased.

In the liquid fuel combustion apparatus according to a fifth aspect of the present invention, as a means for receiving the heat of combustion of the burner, a heat transfer section having a burner receiving seat for mounting the burner is provided. After the heater is energized, the burner placed on the heated burner seat is heated quickly, and the flame hole of the burner is ignited at the time of ignition. It is possible to easily ignite the premixed gas ejected from the fuel cell and reduce white smoke and odor at the time of ignition. Further, when the combustion is started, the combustion heat directly heats the vaporization chamber from the burner receiving seat from a wide area through a heat transfer portion constituting the flat wall surface of the vaporization chamber. Therefore, the inside of the vaporization chamber can be heated to a high temperature.

In the liquid fuel combustion apparatus according to a sixth aspect of the present invention, the heating heater is bent in a U-shape below the burner receiving seat and along approximately half the circumference of the burner receiving seat. Since the heating density of the heating heater in the vicinity of the burner mounting surface of the burner receiving seat increases, the heating heater is energized to preheat the vaporization chamber. -The burner placed on the burner seat is heated quickly, facilitating ignition of the premixed gas spouted from the burner hole at the time of ignition, and reducing white smoke and odor at the time of ignition. be able to.

Further, in the liquid fuel combustion apparatus according to claim 7 of the present invention, the heating heater is bent in a U-shape below the burner receiving seat and along about a half circumference of the burner receiving seat. At the same time, it was formed in a substantially straight line in the vicinity of the heat transfer section and along the heat transfer section. When the heating heater is energized to preheat the vaporization chamber, the heat transfer section is heated by the heating heater at the same time as the vicinity of the burner receiving surface of the burner receiving seat, so that the wall surface of the vaporization chamber is heated. The time required for the vaporization chamber to reach the temperature at which fuel can be vaporized can be reduced by promoting the temperature rise of the heat transfer section constituting the heat transfer section, and the burner mounted on the burner receiving seat is also heated, so that the burner is ignited during ignition. -It is possible to easily ignite the premixed gas ejected from the flame hole of the nozzle, and to reduce white smoke and odor at the time of ignition. In addition, the number of parts can be reduced because a single heating heater can simultaneously heat the burner receiving seat and the heat transfer section.

Further, in the liquid fuel combustion apparatus according to claim 8 of the present invention, since the heating density of the substantially linear portion of the heating heater is made higher than the heating density of the U-shaped portion, the heating fuel is heated. When the heater is energized to preheat the vaporization chamber, the wall of the vaporization chamber is formed by heating the heat transfer section at the same time as the vicinity of the burner mounting surface of the burner receiving seat with a heating heater having a high heat generation density. The time required for the vaporization chamber to reach the vaporizable temperature of the fuel can be further shortened by further increasing the temperature of the heat transfer section, and the burner placed on the burner receiving seat is also heated, so that the burner is burned at the time of ignition. It is possible to easily ignite the premixed gas ejected from the flame hole of the nozzle, and to reduce white smoke and odor at the time of ignition.

[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 partial cross-sectional side view of a carburetor of the liquid fuel combustion device.

FIG. 5 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. 6 is a top view of a carburetor of the liquid fuel combustion device.

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

FIG. 8 is a partial cross-sectional side view of a carburetor of the liquid fuel combustion device.

FIG. 9 is a longitudinal sectional view of a main part of a liquid fuel combustion device according to a third embodiment of the present invention.

FIG. 10 is a top view of a carburetor of the liquid fuel combustion device.

FIG. 11 is a bottom view of a carburetor of the liquid fuel combustion device.

FIG. 12 is a partial sectional side view of a carburetor of the liquid fuel combustion device.

FIG. 13 is a longitudinal sectional view of a main part of a conventional liquid fuel combustion device.

DESCRIPTION OF SYMBOLS 21 carburetor 22 burner receiving seat 22a, 22b heat transfer section 22c carburetor cap 23 nozzle section 25 fuel supply port 26 vaporization chamber 27 vaporization element 28, 28a heating heater 30 burner

Claims (8)

[Claims] 1. A burner for burning a vaporized gas obtained by evaporating a liquid fuel, and a heat receiving means for receiving the heat of combustion of the burner;
A heat transfer section connected to one end of the heat receiving means, a heating heater, a nozzle section at one end, and a substantially flat vaporization chamber having a fuel supply port for liquid fuel at the other end; A liquid fuel combustion device, wherein a wall surface is formed by the heat transfer unit, and a wall surface on a fuel supply port side of the vaporization chamber is thinner than a wall surface on a nozzle unit side. 2. A burner for burning a vaporized gas obtained by evaporating a liquid fuel, and a heat receiving means for receiving the heat of combustion of the burner.
A heat transfer part connected to one end of the heat receiving means, a vaporizer cap provided separately from the heat transfer part provided at one end of the heat transfer part, a heating heater, a nozzle part at one end, and a liquid at the other end A vaporizing chamber having a substantially flat shape provided with a fuel supply port for fuel, wherein a wall surface on a nozzle portion side of the vaporization chamber is the heat transfer portion, and a wall surface on the fuel supply port side of the vaporization chamber is the carburetor cap. Liquid fuel combustion devices configured respectively. 3. The liquid fuel combustion apparatus according to claim 2, wherein the wall thickness of the vaporization chamber formed by the vaporizer cap is made smaller than the wall thickness of the vaporization chamber formed by the heat transfer section. 4. The liquid fuel combustion apparatus according to claim 2, wherein the carburetor cap is made of a material having a lower thermal conductivity than a material of the heat transfer section. 5. The heat receiving means for receiving the heat of combustion of the burner is integrally formed with a heat transfer section having a burner receiving seat on which the burner is mounted. 2. The liquid fuel combustion device according to claim 1. 6. The heating heater according to claim 1, wherein the heating heater is bent in a U-shape below the burner receiving seat so as to extend along about a half circumference of the burner receiving seat. A liquid fuel combustion device as described. 7. A heating heater is bent in a U-shape below the burner receiving seat along substantially half the circumference of the burner receiving seat, and is arranged along the heat transferring portion near the heat transferring portion. The liquid fuel combustion device according to any one of claims 1 to 5, wherein the liquid fuel combustion device has a substantially linear configuration. 8. The liquid fuel combustion apparatus according to claim 7, wherein the heat generation density of the substantially straight portion of the heating heater is higher than that of the U-shaped portion.