JPS6329161B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a vaporization type or atomization type liquid fuel combustion device.

Conventional structure and its problems In general, vaporization type combustion devices supply fuel into a vaporization chamber heated to a high temperature, vaporize it instantly, and eject this vaporized gas to a burner using the gas pressure. The effect is to suck in air and burn it. Therefore, this combustion device has the advantage that the ratio of air and vaporized gas is always constant, so that combustion can be varied over a wide range. However, since the vaporized gas is ejected by increasing its pressure, the diameter of the nozzle that ejects the vaporized gas must be extremely precise and small, and if used for a long time, tar will adhere and burn. There was a problem that had a negative impact on

Therefore, the inventor of the present invention devised a combustion device as shown in FIG. 2 as a solution to such problems.
That is, in FIG. 2, numeral 1 is a fixed tank that forms a constant oil level, and 2 is a cartridge tank that is detachable from the fixed tank 1 and supplies liquid fuel to the fixed oil level so as to maintain the oil level. Reference numeral 3 denotes a vaporization chamber which communicates with the fixed tank 1, maintains the same oil level, and has an air intake port 4 above which communicates with the atmosphere. Reference numeral 5 denotes a vaporizing element which is suspended within the vaporizing chamber 3 and has a heater 6 on its upper part. The liquid fuel sucked up by the vaporizing element 5 is vaporized by the heat of the heater 6. Reference numeral 7 designates a gas nozzle that injects the gasified fuel in the vaporization chamber 3 to the burner 12. An air nozzle 8 that injects an air flow from the burner fan 9 is disposed within the gas nozzle 7. The gasified fuel is emitted from the vaporization chamber 3. The gas is sucked in and ejected from the tip of the gas nozzle 7 along with the air flow ejected from the air nozzle 8, and is burned in the burner 12 via the mixing pipe 11. Further, the fuel condensed in the mixing tube 11 is returned to the vaporization chamber 3 through the drain 10.

With such a configuration, the liquid fuel is sucked up by the vaporization element 5 and vaporized by the heat of the heater 6, thereby filling the vaporization chamber 3. The gasified fuel in the vaporization chamber 3 is sucked together with the air flowing in from the air intake port 4 by the ejector action that occurs when the air flow from the burner fan 9 is ejected from the air nozzle 8, and is ejected from the gas nozzle 7. Therefore, since the gasified fuel ejected from the gas nozzle 7 changes depending on the air flow ejected from the air nozzle 8, the ratio of fuel to air flow is always constant and good combustion can be obtained over a wide range. In addition, since the vaporized fuel is sucked in by the air flow from the air nozzle 8, the nozzle may have a large diameter, and even if tar or the like accumulates, it will have little effect and will last for a long time. Combustion is obtained.

However, according to this configuration, when the gas nozzle 7, mixing pipe 11, and burner 12 are cooled during ignition, the gasified fuel jetted from the gas nozzle 7 tends to condense, and condenses on the inner wall of the mixing pipe 11, etc., and the burner 1
The amount of gasified fuel burned in step 2 is smaller than the amount of air. Also, the mixing of gasified fuel and air flow is not very good. Therefore, until the burner 12 etc. maintains a certain temperature, the combustion balance in the burner 12 is likely to collapse, resulting in lift combustion accompanied by carbon monoxide and odor,
There were problems such as pulsed combustion and eventually misfires.

OBJECTS OF THE INVENTION The present invention was made in view of the above-mentioned problems, and aims to suppress unstable combustion such as lift combustion and pulse combustion during ignition, and to achieve stable combustion quickly.

Composition of the Invention In order to achieve the above object, the present invention provides a liquid fuel supply means, a fuel gasification means for gasifying or atomizing the liquid fuel, a burner for burning the generated gasified fuel, and a liquid fuel supply means for gasifying or atomizing the liquid fuel, and a burner for burning the generated gasified fuel. and an air supply means for guiding the air to the burner by a suction action, and a communication passage for guiding the air from the air supply means into the fuel gasification means, and only at the time of ignition, the air from the air supply means is passed through the communication passage. The fuel gas is supplied into the fuel gasification means.

DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.
is a communication path that guides air from the burner fan 8 into the vaporization chamber 3, and an on-off valve 14 is disposed in the middle of the communication path, which is kept open only for a certain period of time during ignition, and the air from the burner fan 9 is passed into the vaporization chamber. It is designed to lead to within 3.

In the above configuration, when igniting, the burner fan 9
In addition to the gasified fuel that is sucked in by the suction effect that occurs when the airflow from the gas is ejected from the air nozzle 8, the gasified fuel is ejected from the gas nozzle 7 due to the airflow supplied to the vaporization chamber 3 via the communication passage 13. The amount of gasified fuel increases, and the suction effect of the gasified fuel by the air flow from the burner fan 9 becomes greater than during normal combustion. Therefore, a large amount of gasified fuel is ejected from the gas nozzle 7 and supplied to the burner 12 via the mixing pipe 11.
Even if some dew condenses on the way, a little more can be supplied to the burner 12 than during normal combustion, and even when the burner 12 is cooled, stable combustion is likely to occur, and lift combustion and pulsed combustion can be suppressed. Furthermore, since there is a large amount of gasified fuel to be combusted, the temperature of the burner 12 etc. rises quickly, and a stable combustion state is quickly achieved.

Effects of the Invention As described above, according to the present invention, unstable combustion at the time of ignition can be suppressed and stable combustion can be quickly achieved, and odor and carbon monoxide etc. can be reduced at the time of ignition. There is something.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a liquid fuel combustion device according to an embodiment of the present invention, and FIG. 2 is a sectional view of a conventional liquid fuel combustion device. 1, 2... Liquid fuel supply means, 3, 4, 5...
Fuel gasification means, 8, 9...Air supply means, 12
...Burner, 13...Communication path, 14...Opening/closing valve.

Claims (1)

[Claims] 1. A liquid fuel supply means, a fuel gasification means that vaporizes or atomizes the liquid fuel from the liquid fuel supply means, a burner that burns the gasified fuel from the fuel gasification means, and the fuel gasification means. and an air supply means for supplying the generated gasified fuel to the burner by suction, the air supply means is connected to the fuel gasification means via a communication passage, and the communication passage is provided with an on-off valve that opens only when ignition occurs. liquid fuel combustion equipment.