JPH01131807A - Liquid fuel combustion device - Google Patents

Abstract

PURPOSE:To make a long life of a flame aperture plate and a burner mesh by a method wherein a bottom part of the flame aperture plate is provided with a flange and this flange is surface contacted with the upper surface of a lid of a gasification chamber. CONSTITUTION:This liquid fuel combustion device is comprised of a gasification unit 1 having a gasification chamber 2 for use in heating liquid fuel mixed with air and gasifying it, a flame aperture plate 17 for making an efficient combustion of this gasified fuel, a burner mesh 20, and a gasification chamber filter 5 for use in separating this flame aperture plate 17 and the gasification chamber 2. A bottom part of the flame aperture plate 17 is provided with a flange 22 and this flange 22 is surface contacted with an upper surface of the lid 5 of the gasification chamber. Thus, it is possible to improve a thermal conductivity between the flame aperture plate 17 and the gasification unit 1, to keep a proper temperature of the flame aperture plate 17 and the burner mesh 20 and further to preheat the gasification unit 1 with heat of the flame aperture plate 17.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a liquid fuel combustion device that burns liquid fuel.

[Prior Art] A conventional device of this type is shown in FIG. Fig. 2 is a partial sectional view showing the main parts of the configuration of a conventional liquid fuel combustion device, in which (1) is a vaporizer, (2) is a vaporization chamber, (3) is a throat, (4) is a heater, (5) is the vaporization chamber lid, (6) is the air intake hole, (7) is the communication hole,
(8) is a nozzle, (9) is a thermistor, (10) is a needle, (11) is a needle pipe, (12) is a solenoid valve,
(13) is the valve function, (14) is the oil pan, (15) is the oil feed pump, (16) is the oil feed pipe, (17) is the flame hole plate, (
18) is an oil supply pipe, (19) is a nozzle hole, (20) is a burner mesh, and (21) is a flame hole plate presser lid.

The carburetor (1) has an annular vaporization chamber (2), a cylindrical throat (3) in the center, a heater (4) and a fuel supply pipe (1).
8) is injected into it. This oil supply pipe (18) is connected to an oil feed pipe (16), and connects the vaporization chamber (2) and the oil feed pump (15). The nozzle (8) is constructed integrally with the vaporizer (1) or is cast into the vaporizer (1). The nozzle hole (19) is located at the center of the entrance of the throat (3). The thermistor (9) is fixed to the circumferential surface of the vaporizer (1) and detects the temperature of the vaporizer (1). The communication hole (7) connects the vaporization chamber (2) and the nozzle hole (1).
9) is connected to a needle pipe (11), and this needle pipe (11) is connected to a solenoid valve (1).
2) is connected to a plunger (not shown) inside the needle (19) so that the nozzle hole (19) can be opened and closed.
0) is inserted. The solenoid valve (12) has a valve function (
13) and is attached to the top surface of the oil pan (14).

In addition, an air intake hole (6) is opened near the nozzle hole (19) of the throat (3), and a vaporization chamber lid is welded to the tip of the throat (3) to seal the vaporization chamber (2). A flame hole plate (17) is attached through the flame hole plate (17), and a burner mesh (2
0) is installed.

Next, the operation of the conventional liquid fuel combustion device will be explained. The fuel pumped up from the oil pan (14) by the oil feed pump (15) passes through the oil feed pipe (16) to the heater (4).
Vaporization chamber (2) preheated to approximately 200-300°C
The gas is sent to the combustion chamber (2), where it is vaporized and becomes combustion gas.

At the same time, the solenoid valve (12) is turned OFF and closed, the needle (10) is lowered, and the nozzle hole (1
9) opens, and fuel gas is injected into the throat (3) from the nozzle hole (19) through the communication hole (7). At this time, due to the injection force of the vaporized combustion gas injected from the nozzle hole (19), the air taken in through the air intake hole (6) is simultaneously supplied into the throat (3) and mixed within the throat (3). This mixture becomes a gas, and this gas mixture flows through the throat (
3) and is supplied into the flame hole plate (17).
17) Burns above and forms a flame.

In addition, a thermistor (9) fixed to the vaporizer (1)
constantly detects the temperature of the vaporizer (1) during combustion,
The temperature of the vaporizer (1) is adjusted by turning on or cutting off power to the heater 4) in accordance with combustion conditions.

To stop combustion at this point, the oil pump (15) is stopped, the solenoid valve (12) is operated, the needle (10) is moved to close the nozzle hole (19), and at the same time the valve function ( 13) opens, the residual gas in the vaporization chamber (2) moves downward and quickly returns to the oil pan (14) where it is condensed and turned into liquid fuel again.

[Problems to be Solved by the Invention] In the conventional liquid fuel combustion device as described above, the flame hole plate only rests on the vaporization chamber lid and is not in surface contact, so that the flame hole plate and the vaporization chamber The contact area with the lid is small, and the high heat of the flame hole plate generated by the flame cannot be released, and the generated high heat shortens the life of the flame hole plate and burner mesh. On the other hand, the vaporization chamber needs to be heated in order to vaporize the liquid fuel, but there was a problem in that the heat from the flame hole plate could not be fully utilized and heating was done using a heater. .

This invention was made to solve these problems, and it maintains the temperature of the flame hole plate and burner mesh appropriately to extend their lifespan, and also reduces the number of times the heater is used to heat the burner mesh, thereby eliminating waste. The objective is to obtain a liquid fuel combustion device that can perform the following steps.

Means for Solving the Problem] The liquid fuel combustion device according to the present invention is provided with a flange at the bottom of the flame hole plate, and this flange is brought into surface contact with the upper surface of the vaporization chamber lid.

[Function] In this invention, a flange is provided at the bottom of the flame hole plate,
Since this flange is brought into surface contact with the top surface of the vaporizing chamber lid, thermal conductivity between the flame hole plate and the vaporizer is improved.
The temperature of the flame hole plate and burner mesh can be maintained appropriately, and the vaporizer can be preheated by the heat of the flame hole plate.

[Example] Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a partial cross-sectional view showing the main parts of the structure of a liquid fuel combustion device according to the present invention. In the figure, the same reference numerals as in FIG. 2 indicate the same or corresponding parts, and (22) is a flange. The liquid fuel combustion device is configured such that a flange (22) is provided at the bottom of the flame hole plate (17), and a burner mesh (20) is not attached to the surrounding area as in the conventional case. The configuration is the same as that of the conventional liquid fuel combustion apparatus shown in FIG. 1, and the explanation thereof will be omitted here.

Next, the operation of the liquid fuel combustion apparatus according to the present invention will be explained. Similar to the conventional device, the fuel pumped up from the oil pan (14) by the oil transfer pump (15) is transferred to the oil transfer pipe (1
6), and heat the heater (4) to approximately 200 to 300° in advance.
It is sent to the vaporization chamber (2) preheated to C and is vaporized in the vaporization chamber (2) to become combustion gas.

At the same time, the solenoid valve (12) is turned OFF and closed, the needle (10) is lowered, and the nozzle hole (1
9) opens, and fuel gas is injected into the throat (3) from the nozzle hole (19) through the communication hole (7).

At this time, due to the injection force of the vaporized combustion gas injected from the nozzle hole (19), the air taken in by the air intake hole (6) is simultaneously supplied into the throat (3),
A mixed gas is formed in the throat (3), and this mixed gas passes through the throat (3) and is supplied into the flame hole plate (17).
It burns on the flame hole plate (17) and forms a flame.

In addition, a thermistor (9) fixed to the vaporizer (1)
constantly detects the temperature of the vaporizer (1) during combustion,
The temperature of the vaporizer (1) is adjusted by turning on or cutting off power to the heater (4) according to combustion conditions.

To stop combustion at this point, the oil pump (15) is stopped, the solenoid valve (12) is operated, the needle (10) is moved to close the nozzle hole (19), and at the same time the valve function ( 13) opens, the residual gas in the vaporization chamber (2) moves downward and quickly returns to the oil pan (14) where it is condensed and turned into liquid fuel again.

Further, in this invention, a flange (22) is provided at the bottom of the flame hole plate (17), and this flange (22) is brought into surface contact with the upper surface of the vaporizing chamber cover (5). ) and the vaporizer (1), the temperature of the flame hole plate (17) and burner mesh (20) can be maintained appropriately, and the vaporizer (1) can be connected to the flame Preheating can be achieved by the heat of the perforated plate (17).

[Effects of the Invention] As explained above, in this invention, a flange is provided at the bottom of the flame hole plate, and this flange is brought into surface contact with the top surface of the vaporizing chamber lid, so that the gap between the flame hole plate and the vaporizer is reduced. Thermal conductivity is improved, and the temperature of the flame hole plate and burner mesh can be maintained appropriately to extend their service life, and the vaporizer can be preheated by the heat of the flame hole plate.
This has the effect of reducing the number of times of heating by the heater and eliminating waste.

[Brief explanation of the drawing]

FIG. 1 shows the configuration of a liquid fuel combustion device according to the present invention, and FIG. 2 shows the configuration of a conventional device. (1) is a vaporizer, (2) is a vaporization chamber, and (5) is a vaporization chamber lid. , (17) is the flame hole plate, (20) is the burner mesh, (21) is the flame hole plate presser lid, and (22) is the flange. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (2)

[Claims] (1) A vaporizer equipped with a vaporization chamber for heating and vaporizing liquid fuel mixed with air, a flame hole plate and burner mesh for efficiently burning this vaporized fuel, and this flame hole. What is claimed is: 1. A liquid fuel combustion device comprising a vaporization chamber lid that separates a plate and the vaporization chamber, characterized in that a flange is provided at the bottom of the flame hole plate. (2) The liquid fuel combustion apparatus according to claim 1, characterized in that the flange provided at the bottom of the flame hole plate is brought into surface contact with the vaporizing chamber cover.