JPH0341727B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid fuel combustion device used, for example, in a kerosene heater or a kerosene boiler, and particularly to a structure around the vaporization of the fuel.

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

The liquid fuel combustion device shown in the figure includes an oil pan 1, a fuel pump 2, a fuel pipe 3, a vaporization chamber 4, a fuel supply section 5, a nozzle member 6, a nozzle hole 7, an electromagnetic solenoid 8, a pipe 9, a communication pipe 10, and a throat. 11,
Lid 12, flame hole plate 13, outlet 14, heater 1
5, a temperature sensor 16, a needle 17, etc.

In the figure, an oil supply pump 2 is attached to the upper surface of an oil pan 1. One end of a fuel pipe 3 is connected to the fuel pump 2 . The other end of this oil supply pipe 3 is made to protrude into the vaporization chamber 4, and this protruding end serves as an oil supply part 5.

The nozzle member 6 has a nozzle hole 7 at one end thereof. Moreover, one end of a pipe 9 is fixed to the other end. The other end of the pipe 9 is connected to the electromagnetic solenoid 8.

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 is supported by the communication pipe 10. Communication pipe 10
The vaporization chamber 4 side of is projected into the vaporization chamber 4.

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

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

The flame hole 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 into the vaporization chamber 4.

The temperature sensor 16 is used to control the temperature of the vaporization chamber 4, and is screwed into the vaporization chamber 4.

The following operation will be explained.

When the heater 15 is energized, the vaporization chamber 4 is heated. When the temperature inside the vaporization chamber 4 reaches 200 to 300°C, this is detected by the temperature sensor 16. Based on the detection by the temperature sensor 16, the oil supply pump 2 performs oil supply, and fuel oil is supplied into the vaporization chamber 4 through the oil supply pipe 3.

The supplied fuel oil is transferred from the oil supply section 5 to the bottom wall 4 of the vaporization chamber.
It is dropped onto a and 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 created in this way
3. As a result, when the air-fuel mixture flowing out from the outer periphery of the flame hole plate 13 is ignited, a fuel flame 19 is generated, and thereafter the fuel is sustained by the continuously fed fuel.

[Problems to be Solved by the Invention] However, in the conventional liquid fuel combustion apparatus described above, the fuel supply pipe 3 and the communication pipe 10 are located in the flow path of the air sucked into the throat 11. Therefore, the oil supply pipe 3 and the communication pipe 1
0, the primary air suction state into the throat 11 is hindered, and problems such as, for example, the flow of the primary air is obstructed and it becomes difficult to obtain a stable combustion state are caused. It was clarified by the inventors.

This invention was made in order to solve this problem, and it is possible to obtain a stable fuel condition by smoothing the primary air suction condition with a simple structure that makes it possible to reduce manufacturing costs. The purpose of this invention is to obtain a liquid fuel combustion device with

[Means for Solving the Problems] A liquid fuel combustion device according to the present invention includes a nozzle member having a vaporization chamber for vaporizing liquid fuel, a nozzle hole for ejecting the vaporized fuel together with air, and a nozzle member for ejecting the vaporized fuel from the nozzle hole. a throat that mixes the vaporized fuel and external air; a combustion section that burns the vaporized fuel mixed with the external air; a fuel supply pipe that sends fuel to the vaporization chamber; A refueling section that supplies fuel into the vaporization chamber;
It has a communication hole that communicates the vaporization chamber and the nozzle hole, and the air intake side of the throat is partially extended, and the nozzle member is cast and fixed to the extended part, and The communication hole and the member constituting the oil supply section are arranged at a position where they are substantially hidden behind the wall surface of the non-hole portion formed by the extended portion when viewed from the jet port of the nozzle hole.

[Function] With the above means, primary air suction into the throat can be smoothly performed without being obstructed by obstacles. This makes it possible to smoothly suck primary air and obtain a stable combustion state.

Additionally, the assembly process is simplified by casting the nozzle member into the throat extension and fixing it.
This makes it possible to reduce manufacturing costs.

[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 of the minus part in FIG.

The liquid fuel combustion apparatus shown in FIGS. 1 and 2 is basically the same as the liquid fuel combustion apparatus described above, and the only differences are as follows.

That is, in the liquid fuel combustion apparatus shown in FIGS. 1 and 2, the air intake port 25 side of the throat 11 is partially extended downward, and the nozzle member 6 is cast and fixed to this extended portion. There is. Along with this, a communication hole 23 that communicates the vaporization chamber 4 and the nozzle hole 7 and a fuel supply member 21 that supplies fuel to the vaporization chamber 4.
However, when viewed from the ejection port of the nozzle hole 7, it is arranged at a position where it is almost hidden behind the non-hole wall surfaces 4b and 4c formed by the extended portion.

At this time, the non-hole wall surface 4 due to the extended portion
As shown in FIG. 2, a and 4b are formed by being equally divided into two left and right positions that are symmetrical with respect to each other. In other words, they are arranged in a manner that is balanced in the circumferential direction. The communication hole 23 and the oil supply member 21 are arranged so as to be substantially located within the blind angles θ1 and θ2 created by the non-hole wall surfaces 4a and 4b. The blind angles θ1 and θ2 are the non-hole wall surface 4b,
In order to open a balanced air flow path between 4c and 4c, the sizes are approximately equal (θ1≒θ
2).

Here, the communication hole 23 is formed where a part of the vaporization chamber 4 extends. A temperature sensor 24 is attached to this portion by screwing.

The vaporization chamber 4 is made of a cast product such as an aluminum die-cast product.

The oil supply member 21 forming the oil supply section is separated from the oil supply pipe 3 and formed independently. A refueling member 21 formed by dividing and making only the refueling part independent from the refueling pipe 3 is connected to the vaporization chamber 4 along with the nozzle member 23.
It is fixed by simultaneous casting. The oil supply member 21 has its upper portion projected into the vaporization chamber 4,
Its lower part is joined to the oil supply pipe 3 by a cap nut 22.

Also, a communication hole 2 between the nozzle hole 7 and the vaporization chamber 4 is provided.
3 is formed integrally with the nozzle member 6. The oil supply member 21 and the nozzle member 6 are each fixed to the vaporization chamber 4 by being cast simultaneously with the air intake port 25 remaining when the vaporization chamber 4 is cast.

Next, the operation will be explained.

1 and 2, when the heater 15 is energized, the vaporization chamber 4 is heated. Vaporization chamber 4
When the temperature inside reaches 200-300°C, this is detected by the temperature sensor 16. This temperature sensor 1
Upon detection of step 6, fueling is performed by the fueling pump 2, and fuel oil is supplied into the vaporization chamber 4 through the fueling pipe 3.

The supplied oil is dripped onto the bottom wall 4a of the vaporization chamber and is heated and vaporized. This vaporized fuel is
It passes through and is ejected from the nozzle hole 7. The kinetic energy generated by 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 thereafter combustion is sustained by the connected fuel.

In this case, the air sucked into the throat 11 is distributed through the non-porous wall portion 4b, which is balanced in the circumferential direction.
It flows between 4c. At this time, the primary air suction into the throat 11 is carried out through the non-hole wall surfaces 4a and 4 described above.
By arranging the communication hole 23 and the oil supply member 21 so that they are almost located within the blind angles θ1 and θ2 created by b, the operation can be carried out smoothly without being hindered by obstacles. . This makes it possible to smoothly suck primary air and obtain a stable combustion state.

Further, by casting the nozzle member 6 into the extended portion of the throat 11 and fixing it, the assembly process is simplified, thereby making it possible to reduce manufacturing costs.

[Effects of the Invention] As explained above, in this invention, the air intake side of the throat is partially extended, and the nozzle member is cast and fixed to this extended part, while the vaporization chamber and the nozzle hole are connected. The fuel supply member that supplies fuel to the communicating hole and the vaporization chamber is arranged at a position where it is almost hidden behind the wall surface of the non-hole portion formed by the extending portion when viewed from the jet port of the nozzle hole. This has the effect of smoothing the suction state of primary air and obtaining a stable combustion state, even with a simple configuration that enables reduction of manufacturing costs.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view showing an embodiment of a main part of a liquid fuel combustion apparatus according to the present invention, FIG. 2 is a cross-sectional bottom view at the - part of FIG. 3, and FIG. FIG. 3 is a cross-sectional side view showing main parts. In the figure, 1 is an oil pan, 2 is an oil supply pump, and 3
is the oil supply pipe, 4 is the vaporization chamber, 4a is the bottom wall of the vaporization chamber,
5 is an oil supply part, 6 is a nozzle member, 7 is a nozzle hole, 8
is an electromagnetic solenoid, 9 is a pipe, 10 is a communication pipe, 11 is a throat, 12 is a lid, 13 is a flame hole plate, 14 is an 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 communication hole, 24 is a temperature sensor, 2
5 is an air intake port. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] 1. A vaporization chamber for vaporizing liquid fuel, a nozzle member having a nozzle hole for ejecting vaporized fuel gas together with air, a throat for mixing external air with the vaporized fuel ejected from the nozzle hole, and a throat for mixing external air with the vaporized fuel ejected from the nozzle hole. a combustion section that burns the mixed vaporized fuel; 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; the vaporization chamber and the fuel supply pipe; A liquid fuel combustion device comprising a communication hole connecting between nozzle holes, wherein the air intake side of the throat is partially extended, and the nozzle member is cast and fixed in this extended part. On the other hand, the communication hole and the member forming the oil supply section are arranged at a position such that they are almost hidden behind a non-hole wall surface formed by the extended portion when viewed from the jet port of the nozzle hole. Liquid fuel combustion equipment.