JPS6341715A - Fluid fuel burner - Google Patents

Abstract

PURPOSE:To conduct a stable normal combustion early from the initial period of combustion by cast-molding a nozzle member provided with a nozzle hole into a vaporizing chamber, forming integrally a communicating hole connecting the vaporizing chamber with the nozzle hole by the extension of the vaporizing chamber, and mounting a temperature sensor for controlling the vaporization temperature in the vicinity of the communicating hole. CONSTITUTION:A nozzle member 6 provided with a nozzle hole 7 is cast into a vaporizing chamber 4 and fixed thereto, A communicating hole 23 connecting the vaporizing chamber 4 with the nozzle hole 7, is formed integrally with the vaporizing chamber 4 by the extension thereof, and a temperature sensor 25 for controlling a vaporization temperature is mounted in the vicinity of the communicating hole 23. An oil feed part for feeding a fuel into the vaporizing chamber 4 is divided from an oil feed pipe 3, and is constituted of an independent member as an oil feed member 21. This oil feed member 21 is fixedly fastened to the vaporizing chamber 4 by simultaneous casting. The temperature difference between the nozzle member 6 and the vaporizing chamber 4 is small, and the temperature of the nozzle member 6 in the initial period of combustion is swiftly increased and shifting to a stable normal combustion state is quickened.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid fuel combustion device used in, for example, a kerosene heating hall or a kerosene boiler, and in particular to a structure in the vicinity of vaporizing the fuel.

[Prior Art] FIG. 3 shows a cross-sectional side view of a main part of a conventional liquid fuel combustion device.

FIG. 4 shows a cross-sectional bottom view of the section IV--IV in FIG. 3.

The liquid fuel combustion device shown in FIGS. 3 and 4 has an oil pan (
1), oil supply pump (2), oil supply pipe (3), vaporization chamber (
4>, oil supply part (5), nozzle member (6), nozzle hole (7
), electromagnetic solenoid (8>, pipe (9), communication pipe (10), throat (11), lid (12>), flame hole plate (
13), an outlet (14>), a heater (15), a temperature sensor (16), a needle (17), etc.

In the figure, an oil supply pump (2) is attached to the top surface of an oil pan 1 [1 (1). One end of the oil supply pipe (3) is connected to the oil supply pump (2). The other end of this oil supply pipe (3) is made to protrude into the vaporization chamber (4), and the oil supply part (5) is connected to this protruding end. is formed.

The nozzle member (6> has a nozzle hole (7) at one end. One end of a pipe (9) is fixed to the other end. The other end of the pipe (9) is connected to a solenoid (8). They are installed consecutively.

The electromagnetic solenoid (8) opens and closes the nozzle hole (7) by driving the needle (17).

The nozzle member (6>) is connected and communicated with the vaporization chamber (4) through a communication pipe (10), and this communication pipe (
10).

The vaporization chamber (4> side) of the communication pipe (10) projects into the vaporization chamber (4).

The throat (11) is formed by a hollow portion provided approximately in the center of the vaporization chamber (4), and its upper and lower ends are open.

The lid (12) closes the upper part of the vaporization chamber (4) to seal it. This lid (12) is welded to the vaporization chamber (4).

A flame plate (13) is attached to the top of the lid (12) and covers the outlet (14) of the throat (11).

The heater (15) is for preheating the vaporization chamber (4), and is cast and fixed in the vaporization chamber (4).

The temperature sensor (16) is used to control the vaporization temperature of fuel oil in the vaporization chamber (4), and is screwed into the vaporization chamber (4).

Next, the operation will be explained.

When the heater (15) is energized, the vaporization chamber (4) is heated. The temperature inside the vaporization chamber (4) is 200-300'C
When this temperature reaches the temperature sensor (16), the temperature sensor (16) detects this.The temperature sensor (16) detects this and the refueling pump (2) starts refueling, and the fuel oil enters the vaporization chamber (4>) through the refueling pipe (3). will be supplied.

The supplied fuel oil flows from the fuel supply section (5) to the bottom wall (4a) of the vaporization chamber.
) and is heated and vaporized.

At the same time, the needle (17) is driven by the electromagnetic solenoid (8), and the nozzle hole (7) is opened. As a result, vaporized fuel is ejected from the nozzle hole (7), and the kinetic energy of this ejection causes the air intake port (18) to
Air is drawn in from the throat (11) and mixed with the fuel gas. The air-fuel mixture thus produced is supplied to the flame hole plate (13).

As a result, when the air-fuel mixture flowing out from the outer periphery of the flame hole plate (13) is ignited, a combustion flame (19) is generated, and from then on, combustion is sustained by the continuously fed fuel.

[Problems to be Solved by the Invention] In the conventional liquid fuel combustion device described above, heat is conducted from the vaporization chamber (4) to the nozzle member (6) only through the communication pipe (10). Therefore, in the early stage of combustion, the temperature of the nozzle member (6) did not rise easily. For this reason, the vaporized fuel that has been vaporized at an appropriate temperature in the vaporization chamber (4) is cooled and partially recondensed when passing through the nozzle member (6), which makes combustion unstable in the initial stage. This gave rise to the following problem.

In order to solve the above-mentioned problems, it is necessary to roughly increase the preheating temperature of the vaporization chamber (4), but the nozzle member (6)
If the vaporization chamber (4) is preheated until it reaches an appropriate temperature, another problem arises: the vaporization chamber (4) becomes too hot and normal vaporization is no longer performed.

This invention was made to solve the above-mentioned problems, and has a configuration that can reduce manufacturing costs.
An object of the present invention is to obtain a liquid fuel combustion device that can perform stable and normal combustion early from the initial stage of combustion.

[Means for Solving the Problems] A liquid fuel combustion device according to the present invention includes a vaporization chamber for vaporizing liquid fuel, a nozzle hole for ejecting vaporized strands together with air, and a vaporizer ejected from the nozzle hole. A throat that mixes the fuel and external air, a combustion section that burns the vaporized fuel mixed with the external air, a fuel supply pipe that sends the fuel to the vaporizer mentioned above, and the fuel that is sent through the fuel supply pipe. and a communication hole that communicates the vaporization chamber with the nozzle hole,
A nozzle member in which the nozzle hole is formed is cast into the vaporization chamber and fixed therein, and a communication hole for communicating the vaporization chamber and the nozzle hole is integrally formed by the extension of the vaporization chamber. A temperature sensor for controlling the vaporization temperature is installed near the communication hole formed by extending the vaporization chamber.

[Operation] According to the above means, since the nozzle member is integrally formed as a part of the vaporization chamber, the heat conduction between the vaporization chamber and the nozzle 8IX material is improved, and the heat transfer between the nozzle member and the vaporization chamber is improved. temperature difference becomes smaller. This makes it possible to quickly raise the temperature of the nozzle member that is opened at the beginning of combustion, thereby hastening the transition to a stable normal combustion state.

At this time, by forming the above-mentioned communication hole integrally with the vaporization chamber, the number of component parts and assembly man-hours are reduced, which improves suitability for old production and also reduces manufacturing costs. Become so.

Further, by reducing the temperature difference between the vaporization chamber and the nozzle member, restrictions on the mounting position of the temperature sensor can be significantly relaxed. In other words, the temperature sensor does not necessarily need to be screwed onto the vaporization chamber, but can be simply attached freely near the communication hole formed by extending the vaporization chamber, and the temperature of the vaporization chamber can be appropriately detected. Become.

[Embodiments] Hereinafter, preferred embodiments of the present invention will be described based on the drawings.

In the figures, the same reference numerals indicate the same or equivalent parts.

FIG. 1 shows an embodiment of a main part of a liquid fuel combustion apparatus according to the present invention.

FIG. 2 shows a cross section taken along the line IV--IV in FIG. 1.

The liquid fuel combustion device shown in the figure is basically the same as the liquid fuel combustion device described above, and its configuration is as follows, focusing on the differences from the conventional one.

That is, in the liquid fuel combustion apparatus shown in FIG.
A vaporization chamber (4) for vaporizing liquid fuel, a nozzle hole (7) for ejecting vaporized fuel together with air, and a nozzle hole (7) for ejecting vaporized fuel together with air.
A throat (11) that mixes the vaporized fuel ejected from the external air with external air, a flame hole plate (13) that forms a combustion section that burns the vaporized fuel mixed with the external air, and the vaporization chamber (4).
) and a fuel pipe (3) that sends fuel to
3), a fuel supply member (21) that supplies the fuel sent into the vaporization chamber (4), and a communication hole (23) that connects the vaporization chamber (4) and the nozzle hole (7). and has.

Along with this, a nozzle member (6) in which the nozzle hole (7>) is formed is cast and fixed in the vaporization chamber (4).

Further, a communication hole (23) that communicates the vaporization chamber (4) and the nozzle hole (7) is integrally formed by extending the vaporization chamber (4). A temperature sensor for controlling the vaporization temperature is installed near the communication hole (23) extending from the vaporization chamber.

Here, the vaporization chamber (4) is constituted by a cast molded product. A refueling section that supplies fuel into the vaporization chamber (4) is divided from the refueling pipe (3>) and is constituted by an independent member as a refueling member (21).

This oil supply member (21) is fixed to the vaporization chamber (4) by simultaneous casting. (22) is a cap nut, and the cap nut (22) connects the oil supply member (21) to the oil supply pipe (
3) are connected.

The nozzle member (6) is fixed by being cast into the vaporization chamber (4>, leaving an air intake port (24). This nozzle member (6) has a nozzle hole (7) at one end thereof. At the same time, a pipe (9) is fixed to the other end.

This pipe (9>) is connected to an electromagnetic solenoid (8).

The communication hole (23) passes through the horizontal hole (23a) to the vaporization chamber (
4) is communicated with the inside. This horizontal hole (23a) is
It can be formed by the lost wax method when casting the vaporization chamber (4), or it can be formed by drilling holes from the outside by machining and closing unnecessary parts by welding. (26) shows the welded part. Either way,
The periphery of the communication hole (23) is molded simultaneously with the vaporization chamber (4>) and the members.

The lower outer wall of the communication hole (23) extends downward, and a temperature control temperature sensor (25) is attached to this extended portion by screwing.

Next, the operation will be explained.

In FIG. 1, when the heater (15) is energized, the vaporization chamber (4) is heated. The temperature inside the vaporization chamber (4) is 2
When the temperature reaches 00~300℃, this temperature sensor 9 (16)
Detected by. The detection by the temperature sensor (16) causes the fuel pump (2) to supply fuel, and fuel oil is supplied into the vaporization chamber (4) through the fuel supply pipe (3>).

The supplied oil is dripped onto the bottom wall (4a) of the vaporization chamber and heated.
Be vaporized. This vaporized fuel passes through the communication hole (24) and is ejected from the nozzle hole (7). The kinetic energy of this ejection causes air to be sucked in from the air intake port (18), and this sucked air is entrained with the fuel gas in the throat (11) to form an air-fuel mixture. This air-fuel mixture is then supplied to the flame hole plate (13). When the air-fuel mixture flowing out from the outer periphery of the flame hole plate (13) is ignited, a combustion flame (19) is generated, and from then on, combustion is sustained by the continuously fed fuel.

At this time, in the liquid fuel combustion apparatus shown in FIGS. 1 and 2, the nozzle member (6) is formed by extending a part of the vaporization chamber (4). The heat conduction between the nozzle member (6) and the nozzle member (6) is improved.
) and the vaporization chamber (4) becomes smaller. This makes it possible to quickly increase the temperature of the nozzle member (6) at the initial stage of combustion and hasten the transition to a stable normal combustion state.

In addition, because the communication hole (23) is integrally formed with the vaporization chamber (4), the number of component parts and assembly man-hours are reduced, which improves suitability for mass production and reduces manufacturing costs. will also be achieved at the same time.

Roughly speaking, by reducing the temperature difference between the vaporization chamber (4) and the nozzle member (6), restrictions on the mounting position of the temperature sensor (25) are significantly relaxed. That is, the temperature sensor (25) does not necessarily need to be screwed onto the vaporization chamber (4), but can be attached arbitrarily near the communication hole (23) extending from the vaporization chamber (4). Temperature can now be detected appropriately.

[Effects of the Invention] As described above, the present invention is capable of casting a nozzle member having a nozzle hole into the vaporization chamber and fixing it therein, and integrating a communication hole that communicates the vaporization chamber with the nozzle hole by extending the vaporization chamber. This configuration has the advantage that stable and normal combustion can be performed early from the initial stage of combustion with a configuration that can reduce manufacturing costs.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional side view showing an embodiment of the main part of a liquid fuel combustion device according to the present invention, and FIG.
FIG. 3 is a cross-sectional side view showing the main parts of a conventional liquid fuel combustion device, and FIG. 4 is a cross-sectional bottom view of FIG. 3.
- It is a sectional bottom view in the IV part. In the figure, (1) is the oil pan, (2) is the oil supply pump, (
3> is the oil supply pipe, (4) is the vaporization chamber, (4a) is the bottom wall of the vaporization chamber, (5> is the oil supply part, (6) is the nozzle member, (7) is the nozzle hole, (8) is the electromagnetic solenoid, (9) is a pipe,
(10) is a communicating vibe, (11) is a throat, (12)
The lid, (13) is the flame hole plate, (14) is the outlet, (15>
is a heater, (16) is a temperature sensor, (17) is a needle, (21) is an oil supply member, (22) is a cap nut, (23) is a
) is a communication hole, (24) is an air intake port, and (25) is a temperature sensor. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Figure 1 IJ [Eng. 11 Nisro)-24: Air 1z
25: S two brutal sensor 3: surplus Miyu pie 1
j5: Heater 26:: #J isophone μ min 4: Vaporization electricity 21: jt9 consonant p character 6: Nozuru silent staff 22: Lend, door; :$IK
Chapter 2

Claims (2)

[Claims] (1) A vaporization chamber that vaporizes liquid fuel, a nozzle hole that ejects the vaporized fuel together with air, a throat that mixes the vaporized fuel ejected from the nozzle hole with external air, and a throat that mixes the vaporized fuel mixed with the external air. A combustion section that performs combustion, a fuel supply pipe that sends fuel to the vaporization chamber, a fuel supply section that supplies the fuel sent through the fuel supply pipe into the vaporization chamber, and a communication between the vaporization chamber and the nozzle hole. A liquid fuel combustion device comprising a communication hole, wherein a nozzle member in which the nozzle hole is formed is cast and fixed in the vaporization chamber, and a communication hole that communicates the vaporization chamber and the nozzle hole. A liquid fuel combustion device characterized in that it is formed by extending a vaporization chamber. (2) The liquid fuel combustion device according to claim (1), wherein a temperature sensor for controlling vaporization temperature is installed near the communication hole formed by extending the vaporization chamber.