JPH05322123A - Vaporizer - Google Patents

Abstract

PURPOSE:To improve vaporization capacity by inclining downward an end side of an oil feed nozzle. CONSTITUTION:An oblique upper surface 21 is extended and inclined from an upper end of an oblique vaporization surface 17. An oil feed nozzle 24 is inclined down at its end, and disposed near the surface 21. Thus, since kerosene is injected obliquely downward from the nozzle 24, a collision angle a between the kerosene and a collision surface 19 is increased, the kerosene is strongly disordered that much to remove a large quantity of heat from the surface 19. Further, the kerosene is collided to be dispersed in all directions, and vaporized while being diffused widely on the surface 17. As a result, its vaporization capacity is improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vaporizer for vaporizing liquid fuel.

[0002]

2. Description of the Related Art In a conventional vaporizer of this type, as shown in FIG. 4, a burner head 2 is provided on the upper surface of a box-shaped mixing chamber 1 having a bottom, and the burner head 2 is in contact with the upstream side of the mixing chamber 1. A carburetor 3 is provided on the side. An upper portion of the vaporizer 3 is provided with an inclined vaporizing surface 5 whose upper portion is inclined toward the burner head 2 side and which houses a U-shaped heater 4. The vaporizer lid 6 is provided with a vaporization air inlet 7 for supplying air to the vaporizer 3 so as to face the middle of the inclined vaporization surface 5, and an oil feeding nozzle 8 horizontally attached to the vaporization air inlet 7 is inclined. It faces the upper part of the vaporization surface 5. Further, a heat receiving fin 9 is provided on the inclined outer wall of the inclined vaporizing surface 5 above the burner head 2. Here, the air chamber 11 communicating with the combustion fan 10 is provided so as to include the carburetor 3 and the burner head 2, and an ignition electrode 12 is provided near the downstream of the burner head 2. Further, the vaporizer thermistor 13 is provided on the upper outer wall of the vaporizer 3.

Next, the preheating operation in the above configuration will be described. The carburetor 3 is preheated by the U-shaped heater 4 which is first energized. When the output of the carburetor thermistor 13 reaches the standby set value due to this preheating, the power of the U-shaped heater 4 is turned on and off at this output, and the inclined vaporization surface 5 is controlled to reach the standby temperature.

Next, the combustion operation will be described. The air sent from the combustion fan 10 is divided into two systems: vaporized air that flows into the vaporizer 3 from the vaporized air inlet 7 and rises along the surface of the inclined vaporization surface 5, and secondary air that is ejected from the burner head 2. Supplied. In particular, a part of the vaporized air reaches the vaporizer lid 6 from the upper part of the inclined vaporization surface 5 along the inner top surface of the vaporizer 3. On the other hand, the kerosene jetted from the oil feeding nozzle 8 and colliding with the inclined vaporizing surface 5 is vaporized while taking heat from the inclined vaporizing surface 5. The vaporized gas generated here mixes with the previous vaporized air to form a premixed gas, which is ejected from the burner head 2 and ignited by the discharge of the ignition electrode 12 to start combustion, and further the combustion is promoted by the secondary air. To be done. Then, when the combustion heat is conducted to the vaporizer 3 by the heat receiving fins 9, the output of the vaporizer thermistor 13 approaches the vaporization set value, and at the same time, the power of the U-shaped heater 4 is turned on and off and the inclined vaporization surface 5 waits. The vaporization temperature is controlled to be about 40 ° C. higher than the temperature.

[0005]

However, in the structure of the conventional vaporizer described above, since the collision angle θ between the kerosene ejected from the oil feed nozzle 8 and the inclined vaporization surface 5 is small, the kerosene is less disturbed by the collision. That is, since the thermal conductivity between the kerosene and the inclined vaporization surface 5 is small, the kerosene cannot take much heat from the inclined vaporization surface 5. Further, kerosene is less dispersed by collision and flows like a belt on the surface of the inclined vaporizing surface 5. These results,
There was a problem that the vaporization ability was small.

Further, when kerosene droplets are attached to the tip of the oil feeding nozzle 8 due to vaporized air or a sudden change in the amount of combustion, since the main body of the oil feeding nozzle 8 is mounted horizontally, the kerosene droplets feed oil. There was a problem that it was transmitted to the main body of the nozzle 8 and fell out of the vaporizer 3.

On the other hand, when the temperature of the inclined vaporizing surface 5 is near the standby temperature, the vaporizing capacity is naturally small, so that part of the kerosene colliding with the inclined vaporizing surface 5 spreads to the inner ceiling surface of the vaporizer 3.
It reaches the carburetor lid 6 by the surface tension of the kerosene itself and the vaporized air flowing along the inner ceiling surface of the carburetor 3. Since the vaporizer lid 6 is separated from the U-shaped heater 4 and the heat receiving fins 9, there is a problem that the temperature of the vaporizer lid 6 is low and the kerosene attached to the vaporizer lid 6 is poorly vaporized.

Therefore, the present invention has been made to solve the above-mentioned problems and has as its object the improvement of the vaporization capacity and the prevention of drops of kerosene liquid droplets from the vaporizer.

[0009]

Means for Solving the Problems In order to achieve the above object, the means for solving the problems of the present invention is an inclined vaporizing surface provided in a vaporizer and a ceiling top surface extending from the upper end of the inclined vaporizing surface. And a carburetor lid that is erected so as to be in contact with the top surface and face the inclined vaporization surface, a vaporized air inlet that is provided on the vaporizer lid so as to be adjacent to the top surface, and an inclined vaporization that is adjacent to the top surface. The oil supply nozzle is provided so as to be inclined downward so that the collision angle between the surface and the jetted fuel becomes large.

[0010]

According to the present invention, since kerosene is jetted obliquely downward from the oil feeding nozzle by the above-described structure, the collision angle between kerosene and the inclined vaporizing surface is large, and kerosene is strongly disturbed by the collision. That is, since the thermal conductivity between kerosene and the inclined vaporization surface is large,
Kerosene can remove a large amount of heat from the inclined vaporization surface. Further, kerosene that collides with the upper part of the inclined vaporizing surface is dispersed in all directions and vaporizes while spreading the surface of the inclined vaporizing surface widely.

Further, when kerosene droplets are attached to the tip of the oil feeding nozzle due to vaporized air or a sudden change in the amount of combustion, the kerosene droplet is attached obliquely downward so that the kerosene droplet is the tip of the oil feeding nozzle. Falls into the vaporizer.

When the inclined vaporizing surface is near the standby temperature, since the vaporizing capacity is small, a part of kerosene that collides with the inclined vaporizing surface is
It extends to the top of the sky. However, since the top surface is inclined upwards, the kerosene that has spread to the top surface cannot reach the vaporizer lid,
It returns to the inclined vaporizing surface again and vaporizes.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

1 to 3, reference numeral 14 denotes a box-shaped mixing chamber having a bottom, a burner head 15 is provided on the upper surface, and a vaporizer 16 is provided on the upstream side of the mixing chamber 14 in contact with the burner head 15. .. The vaporizer 16 is at the top and the burner head 1 at the top.
An inclined vaporizing surface 17 is formed so as to be inclined toward the side of No. 5, and both linear portions of a U-shaped heater 18 are built in the upper portion and the lower portion of the inclined vaporizing surface 17. This inclined vaporization surface 17
A collision surface 19 which is recessed on one side of the above and is inclined similarly to the inclined vaporization surface 17 is provided, and the inclined vaporization surfaces 17 other than this collision surface 19 are provided with diffusion grooves 20 extending in a substantially horizontal direction. Further, a top surface (hereinafter referred to as an inclined top surface) 21 that is inclined upward from the upper end portion of the inclined vaporization surface 17 is provided, and the vaporizer is in contact with the open end of the inclined top surface 21 and faces the inclined vaporization surface 17. The lid 22 is erected. The vaporizer lid 22 is provided with a vaporized air inlet 23 which is adjacent to the inclined upper surface 21 and faces the collision surface 19. Further, at the upper part of the vaporized air inlet 23, the oil feeding nozzle 2 inclined downward so that the collision angle α between the collision surface 19 and the ejected fuel becomes large.
4 and the tip of the oil feeding nozzle 24 is the inclined upper surface 2
It is disposed inside the vaporizer 16 in the vicinity of 1. A heat receiving fin 25 located above the burner head 15 is provided on the inclined outer wall of the inclined vaporizing surface 17. Further, a carburetor 16 and a burner head 15 are included behind the carburetor lid 22,
A combustion fan 27 that communicates with an air chamber 26 that supplies air is provided. In addition, 28 is an ignition electrode provided near the downstream of the burner head 15, and 29 is a vaporizer thermistor provided on the upper outer wall of the vaporizer 16.

Next, the preheating operation in the above configuration will be described. The carburetor 1 is turned on by the U-shaped heater 18 which is first energized.
6 is preheated. When the output of the carburetor thermistor 29 rises to the standby set value due to this preheating, the power of the U-shaped heater 18 is turned on and off at this output, and the inclined vaporization surface 17 is controlled to reach the standby temperature.

Next, the combustion operation will be described. The air sent from the combustion fan 27 is divided into two systems, that is, vaporized air that flows into the vaporizer 16 from the vaporized air inlet 23 and rises along the surface of the inclined vaporization surface 17, and secondary air that is supplied to the burner head 15. To be done. On the other hand, kerosene is jetted from the oil feeding nozzle 27 and vaporized by the vaporizer 16. The generated vaporized gas is mixed with vaporized air in the mixing chamber 14 and ignited by the ignition electrode 28 in the burner head 15 to burn with the secondary air, so that the combustion characteristics are good. When the combustion heat received by the heat receiving fins 25 is transferred to the carburetor 16, the output of the carburetor thermistor 29 approaches the vaporization set value, and at the same time U
The character-shaped heater 18 is turned on and off to control the inclined vaporization surface 17 to have a vaporization temperature higher by about 40 ° C. than the standby temperature.

Next, the vaporization of kerosene will be described in detail. Since the inclined top surface 21 is provided on the inner top surface of the carburetor 16, the main body of the oil feeding nozzle 24 can be inclined obliquely downward and the tip can be disposed above the inclined vaporization surface 17, so that the collision surface 1
9 can be formed on the upper part of the inclined vaporization surface 17. Then, kerosene is jetted downward by the oil feeding nozzle 24, and the collision surface 1
Clash with 9. This kerosene is strongly disturbed because the collision angle α (> θ) between the kerosene and the collision surface 19 is larger than that of the conventional example, so that the heat transfer coefficient between the kerosene and the collision surface 19 is large, and the kerosene is absorbed by the collision surface 19. Take a lot of heat from. After that, kerosene is dispersed in all directions at the collision surface 19 and vaporized while spreading the surface of the inclined vaporization surface 17 widely. As a result, the vaporization ability can be improved.

Further, even when kerosene droplets adhere to the tip of the oil feeding nozzle 24 due to vaporized air or a sudden change in the amount of combustion,
Since the main body of the oil feeding nozzle 24 is attached obliquely downward, kerosene droplets drop from the tip of the oil feeding nozzle into the vaporizer 16. That is, it is possible to prevent the kerosene droplets from falling outside the vaporizer.

When the temperature of the inclined vaporizing surface 17 is near the standby temperature, the vaporizing capacity is naturally small, so that part of the kerosene that collides with the inclined vaporizing surface 17 spreads to the inclined top surface 21. But,
Since the inclined top surface 21 is inclined upward, the kerosene spread on the inclined top surface 21 does not reach the carburetor lid 22 due to its own weight, but returns to the inclined vaporization surface 17 again and is vaporized. As a result, the vaporization ability can be improved.

[0020]

As described above, the vaporizer of the present invention has the following advantages.

The inclined top surface is inclined upward from the upper end of the inclined vaporization surface, and the oil feed nozzle is adjacent to the inclined top surface, and is moved downward so that the collision angle between the inclined vaporization surface and the ejected fuel is large. Since the fuel is tilted, the fuel is ejected obliquely downward from the oil feeding nozzle, and the kerosene that collides with the inclined vaporizing surface can remove a large amount of heat from the inclined vaporizing surface. After that, kerosene is dispersed in all directions,
It vaporizes while spreading the surface of the inclined vaporization surface widely. As a result, the vaporization ability can be improved.

Further, even if kerosene droplets adhere to the tip of the oil feeding nozzle, the kerosene droplet is inclined downward, so that the kerosene droplets drop from the tip of the oil feeding nozzle into the vaporizer. Therefore, it is possible to prevent the kerosene droplets from falling outside the vaporizer.

When the temperature of the inclined vaporizing surface is near the standby temperature,
A part of the kerosene spreads to the upper surface of the inclined ceiling, but the kerosene does not reach the carburetor lid due to the inclination of the upper surface of the inclined ceiling and the weight of the kerosene and returns to the inclined vaporizing surface to be vaporized again, so that the vaporization ability is improved.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a vaporizer according to an embodiment of the present invention.

FIG. 2 is a partial cross-sectional perspective view showing a main part of the apparatus.

FIG. 3 is a partially cutaway external perspective view of the device.

FIG. 4 is a partial cross-sectional perspective view showing a main part of a conventional vaporizer.

[Explanation of reference numerals] 16 vaporizer 17 inclined vaporization surface 21 inclined top surface 22 vaporizer lid 23 vaporized air inlet 24 oil feed nozzle

Claims (1)

[Claims] 1. A vaporizer for vaporizing fuel, an inclined vaporization surface provided on the vaporizer, a top surface extending from an upper end portion of the inclination vaporization surface, and an open end portion of the top surface. A vaporizer lid which is erected so as to be in contact with and faces the inclined vaporization surface, a vaporized air inlet for supplying vaporized air provided so as to be adjacent to the top surface of the vaporizer lid, and adjacent to the top surface, A vaporizer comprising: an oil feeding nozzle provided so as to be inclined downward so as to increase a collision angle between the inclined vaporizing surface and the jetted fuel.