JPS6078211A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To make a variable range of combustion large by maintaining predetermined excess air ratio to a quantity of combustion and to lengthen life of a nozzle, by sucking gasified fuel through an ejector action to be generated by eruption of combustion air. CONSTITUTION:Fuel is sucked by an evaporating element 5, evaporated by heat of a heater 6 and filled within an evaporating chamber 3. Gasified fuel in the evaporating chamber 3 along with air flowing in through an air intake 4 are sucked by ejector effect to be generated when air from a burner fan 9 is erupted through an air nozzle 8 and erupted from a burner part 7a of the tip of a gas nozzle 7. The gasified fuel, therefore, is varied according to an air flow and an excess air ratio can be kept fixed always. Then a quantity of combustion can be made variable stably in a wide range easily by controlling only a qnantity of air to be supplied from a burner fan 9. As for the diameter of an erupting port of the tip of the gas nozzle 7, as the size to such an extent sucking the gas through the ejector effect is good, it is unnecessary to make the title burner so small and it becomes hardly influential even if tar is sticked.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a vaporizing or atomizing liquid fuel combustion device.

Structure of the conventional example and its problems A conventional liquid fuel combustion device, for example, a pressure vaporization oil combustion device, has a fixed tank 11 and a removable fuel supply device installed in the fixed tank 11, as shown in FIG. The cartridge tank 12 and the pump 13 that sucks up fuel from the fixed tank 11 and supplies it to the carburetor 14 premix the fuel vaporized gas ejected from the nozzle 15 of the carburetor 14 and the air sucked by its ejector effect. and guide it to burner 17.
1. Mixing tube 16, fuel condensed inside the mixing tube 16, l+
It consists of a drain pipe 3 (page 18) for returning water into the fixed tank 11, and a vaporizing electromagnetic valve 19 having a needle valve for opening and closing the nozzle 15 of the vaporizer 14.

This combustion device is connected to the fixed tank 1 by the pump 13.
The fuel sucked up from 1 is instantly vaporized by the vaporizer 14 and ejected from the nozzle 15 into the mixing pipe 16 as vaporized fuel gas. Due to the suction effect generated at this time, the vaporized fuel gas uses the surrounding air as premixed air for combustion. Suction mixing pipe 1
6 and combusts in burner 17. Therefore, the premixed combustion air changes according to the amount of fuel vaporized gas ejected, and the ratio of the combustion premixed air to the fuel vaporized gas, that is, the air ratio, is kept almost constant, and by varying only the fuel, the amount of combustion is changed. It has the advantage that it can be easily varied and the combustion amount can be varied over a wide range.

However, in this method, in order to increase the suction effect that occurs when the fuel vapor gas is ejected from the nozzle 15 of the carburetor 14, the temperature of the vaporizer 14 is increased, and the fuel supplied from the pump 13 can be instantly vaporized in large quantities. At the same time, the diameter of the ejection port of the nozzle 15 is reduced to increase the ejection pressure.

JP-A-Sho GO-78211 (2) Therefore, the nozzle 15 requires precision, and the nozzle 15
If the nozzle spout is clogged with tar, the vaporization conditions may change and the amount of fuel vaporized gas may change, or the vaporizer solenoid valve 19 may close the nozzle 1 of the vaporizer 14 when extinguishing a fire.
There was a problem that the fire extinguisher could not be completely closed, resulting in a strong extinguishing odor and a long-lasting odor.

Purpose of the Invention The present invention has been made in view of the above-mentioned problems.It maintains a constant air ratio to the combustion amount, narrows the combustion variable range, is less susceptible to tar, etc., and has a long lifespan. Structure 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 the liquid fuel, and a gasified fuel generated by the liquid fuel supply means. A burner for combustion and an air supply means for supplying premixed air for combustion to the burner are provided, and the gasified fuel in the five-base conversion means is sucked from the air supply means and supplied to the burner. It's Nishide.

DESCRIPTION OF THE EMBODIMENTS An embodiment will be described below with reference to FIG. 1. 1 is a fixed tank that forms a constant oil level, 2 is a cartridge tank that is detachably attached to the fixed tank 1, and is a cartridge tank that is capable of storing liquid fuel. Keep it at a constant oil level. 3 is a vaporization chamber communicated with the fixed tank 1, which maintains the same oil level as the fixed tank 1, and is set so that its internal pressure becomes atmospheric pressure through an air intake port 4 provided at the top. . Reference numeral 5 denotes a vaporizing element which is suspended in the vaporizing chamber 3 and has a heater 6 at its second part. 7, the gasified fuel in the vaporization chamber a is transferred to the burner section 7a.
An air nozzle 8 for ejecting air from the burner fan 9 is disposed inside the gas nozzle, and the gasified fuel is sucked from the vaporization chamber 3 by the ejector effect of the air flow ejected from the air nozzle 8. There are many people.

In the above configuration, fuel is sucked up by the vaporization element 5 and vaporized by the heat of the heater 6, filling the vaporization chamber 3, but the temperature of the gasified fuel generated at this time is extremely low, around 70 to 80 degrees Celsius. The influence of heat on the gas nozzle 7 can be reduced. On the other hand, 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 effect that occurs when air from the burner fan 9 is ejected from the air nozzle 8, and is sucked into the burner section 7a at the tip of the gas nozzle 7.
, J:') gush. Therefore, the gasified fuel ejected from the burner section 7a changes according to the air flow ejected from the air nozzle 8, and the ratio of the gasified fuel to the air flow, that is, the air ratio, can always be kept constant. The combustion amount can be easily and stably varied over a wide range by simply controlling the amount of air supplied from the burner fan 9. Furthermore, when extinguishing fire, if the air from the air nozzle 8 is stopped, the ejector effect is also eliminated, combustion stops instantaneously, and no fire extinguishing odor is generated.

On the other hand, the diameter of the tip outlet of the gas nozzle 7 (which also serves as the burner part in this embodiment) is sufficient to suck the gas by the ejector effect, so the diameter of the tip of the gas nozzle 7 (which is also used as the burner part in this embodiment) has to be large enough to suck the gas by the ejector effect. There is no need to make it small, and the temperature of the gas nozzle 7 mentioned above can be maintained low, so that cool adhesion is reduced, and even if tar adheres, its influence will be negligible.

Note that the gasified fuel generated in the second vaporization chamber 3 is sufficiently larger than the amount sucked in by the air nozzle 8, and the gasified fuel that is not sucked in by the air nozzle 8 stays in the vaporization chamber 3 and condenses to become liquid fuel. In addition, as mentioned above, since there is a sufficient amount of gasified fuel, even if, for example, tar adheres to the vaporization element 5 itself and the amount of vaporization decreases, the effect can be completely ignored over a long period of time, and the The service life can be extended.

Further, since the gas nozzle 7 utilizes the ejector effect of the air flow ejected from the air nozzle 8, the diameter of the ejection port of the gas nozzle 7 is made large to increase the ejector effect. Furthermore, since the temperature of the gasified fuel is low, it is difficult for tar to adhere to the gas nozzle 7, and even if tar does adhere to the gas nozzle 7, the diameter of the ejection port is large so that it is not affected much.

In addition, tar adheres to the conversion element 5 itself.Furthermore, in this embodiment, the fixed tank 1 and the cartridge tank 2 are used as a constant oil level device, which has the advantage of being inexpensive. be.

In the above embodiment, the gas nozzle 7 and the air nozzle 8 are provided coaxially, but as shown in FIG. It may be arranged to exhibit the same ejector effect as described above. Also gas nozzle 7
Direct combustion occurs at the tip of the gas nozzle 7 and the air nozzle 8, as shown in Figure 2.
The gasified fuel and the air flow jetting out may be guided to the burner 10 and burned. Further, in this embodiment, the fuel gasification means is of the vaporization type, but it may be of the atomization type, which only atomizes the fuel.

Effects of the Invention As described above, according to the present invention, it is possible to keep the ratio of gasified fuel and air constant and widen the variable range of combustion, and also to provide a nozzle section that spouts gasified fuel and air. This has the advantage that it is difficult to generate tar, and even if cool adheres to the nozzle part, it is hardly affected by it and has a long life.

[Brief explanation of drawings]

Fig. 1 is a sectional view of a liquid fuel combustion device according to an embodiment of the present invention, Fig. 2 is a sectional view showing another embodiment of the invention, and Fig. 3 is an example of a conventional liquid fuel combustion device. FIG. 1.2...Liquid fuel supply means, 3...
Fuel gasification means, 7a, 10...Burner, 8.
...Air supply means.

Claims (1)

[Claims] 1. A liquid fuel supply means, a fuel gasification means for vaporizing or atomizing the liquid fuel from the liquid fuel supply means, and a burner for burning the gasified fuel from the fuel gasification means. and an air supply means for supplying premixed air for combustion to the burner, the internal pressure of the fuel gasification means is set to a pressure lower than the jetting pressure of the air supplied from the air supply means to the burner, and The supply means is a liquid fuel combustion device in which the gasified fuel in the fuel gasification means is sucked by the ejector action generated by the air jet and supplied to the burner. 2. The liquid fuel combustion apparatus according to claim 1, wherein the fuel gasification means is opened to the atmosphere and has a pressure lower than that of the supplied air. 3. The liquid fuel combustion apparatus according to claim 1 of the two-page patent, wherein the air supply means has an air jet port coaxially with a gasified fuel outlet of the fuel gasification means. 4. The liquid fuel combustion apparatus according to claim 1, wherein the air jet port of the air supply means and the gasified fuel outlet of the fuel gasification means are arranged close to each other so as to intersect on an extension line thereof.