JPH028604A - liquid fuel combustion equipment - Google Patents

Abstract

PURPOSE:To restrict an excessive combustion or generation of CO and soot when a weak combustion is rapidly turned to a high combustion by a method wherein a drafting force within a combustion cylinder is reduced in cooperation with a wick adjusting means of a liquid fuel combustion device such as an oil heater and the like. CONSTITUTION:A wick 1 is held between a wick inner cylinder 4 and a wick outer cylinder 5 in such a way as it may be moved vertically, an exposure height of the end of the wick into a combustion chamber 11 is varied by a wick adjusting means 14 so as to adjust an amount of combustion. A suction fan 15 is arranged within a wick inner cylinder 4 so as to generate a flow directed from an upper part to a lower part in cooperation with the wick adjusting means 14. As the combustion is rapidly changed from a weak combustion to a high combustion, the suction fan 15 may form a flow direction from the upper part to the lower part so as to decrease a drafting generated at an upper part within the combustion cylinder 3. Accordingly, since an excessive gasification of fuel is restricted, it is possible to prevent an excessive combustion and occurrence of CO and soot and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a liquid fuel combustion device used for home heating and the like.

BACKGROUND OF THE INVENTION Conventionally, a kerosene stove that has been widely used as this type of liquid fuel combustion apparatus is generally of the type shown in FIG. In FIG. 4, reference numeral 1 denotes a cylindrical lamp wick set vertically and housed in the tank portion 2. In FIG. 3 is a combustion cylinder placed above the tank portion 2. The lamp wick l is held between an inner wick tube 4 and an outer wick tube 5 so as to be vertically movable. Reference numeral 6 denotes a fuel holding section in which liquid fuel is kept at a constant level. The lower end of the wick 1 is immersed in liquid fuel, and the fuel is transferred to the wick 1 by capillary action.
It is sucked up to the tip. The upper ends of the inner core tube 4 and the outer core tube 5 form an inner flame tube 7 and an outer flame tube 8, respectively, and an inner flame tube 9 and an outer flame tube 10 having a large number of air holes are i! l! It is placed. The tip of the wick 1 is connected to the inner flame tube 9 and the outer flame tube l during combustion.
It is exposed in the combustion chamber 11 formed between the two cylinders, and the fuel is vaporized here. 12 is an outer cylinder, and 13 is a transparent cylinder made of glass or the like placed on the outer cylinder 12. Numeral 14 is a wick adjusting means that adjusts the amount of combustion by changing the exposed height of the tip of the wick into the fuel chamber.

In the above configuration, when the lamp wick 1 is ignited, the fuel vaporizes and starts combustion. Fuel is vaporized by combustion heat m'I? t
At the same time, the air necessary for combustion is supplied into the combustion chamber 11 from the air holes of the inner flame tube 9 and the outer flame tube 10 by the thermal draft generated in the combustion chamber 11, and the combustion continues and the outer flame tube 10 is heated to red heat. The radiant heat was used for heating purposes, etc.

Problems to be Solved by the Invention In a combustor having such a configuration, the exposed height of the wick 1 is lowered by the wick adjusting means 14 to reduce the amount of vaporization and the amount of combustion. In this case, the ratio of air to fuel in the combustion chamber 11 changes, and the air ratio in the lower part of the combustion chamber 11 increases during weak combustion compared to during strong twist firing. Therefore, a flame is formed in the air holes at the bottom of the inner and outer flame tubes 9 and 10, and the temperature near the wick l rises.

For this reason, when there is a sudden change from weak combustion to strong twist firing, the temperature near wick 1 does not immediately drop to the temperature during strong twist firing, resulting in an excessive amount of fuel vaporization, which is indicated by the diagonal lines in Figure 5. Excessive combustion as shown in area A occurs, and a large flame is generated above the combustion tube. In addition, CO and soot may be generated due to lack of air and insufficient mixing due to sudden changes, which may cause problems in terms of safety and comfort. I had an issue with this.

Means for Solving the Problem In order to solve this problem, the present invention is provided with a draft force suppressing means that works in conjunction with the wick adjusting means and reduces the draft force generated in the combustion cylinder using a fan or the like. .

Effect When the above configuration suddenly changes from weak combustion to strong twist firing, the draft force in the combustion cylinder is reduced by the draft force suppressing means, and the amount of fuel vaporized is reduced, so combustion is suppressed and excessive flame and CO can be prevented from occurring.

EXAMPLE An example of the present invention will be described below with reference to the drawings. 1st
In the figure, reference numeral 1 denotes a cylindrical lamp wick set vertically and housed in a tank portion 2. 3 is a combustion cylinder placed above the tank portion 2. The lamp wick 1 is held between an inner wick tube 4 and an outer wick tube 5 so as to be vertically movable. Reference numeral 6 denotes a fuel holding section in which liquid fuel is kept at a constant level. The lower end of the wick 1 is immersed in liquid fuel, and the fuel is sucked up to the tip of the wick 1 by capillary action. The upper ends of the inner core tube 4 and the outer core tube 5 form an inner flame tray 7 and an outer flame tray 8, respectively, and an inner flame tube 9 and an outer flame tube 10 each having a large number of air holes are mounted thereon. During combustion, the tip of the wick 1 is exposed in a combustion chamber 11 formed between an inner flame tube 9 and an outer flame tube 10, where the fuel is vaporized. 12 is an outer cylinder, and 13 is a transparent cylinder made of glass or the like placed on the outer cylinder 12. Numeral 14 is a wick adjusting means that adjusts the amount of combustion by changing the exposed height of the tip of the wick into the fuel chamber. Reference numeral 15 denotes an intake fan which is a draft force suppressing means and is set inside the core inner cylinder 4. This intake fan is set to produce a flow from the top to the bottom and is linked with the wick adjustment means 14.

In the above configuration, when the combustion amount is suddenly changed from weak combustion to strong twist firing, the intake fan 15 operates, forming a flow from above to below as shown by the black arrow, and causing an upward flow into the combustion tube 3. Reduces the draft forces generated. As a result, excessive vaporization of the fuel is suppressed, so excessive combustion and generation of CO1 soot can be prevented. FIG. 2 shows the effect of this embodiment. Since the amount of combustion is suppressed by operating the intake fan 15 at the same time as switching from weak combustion to strong twist firing, excessive combustion as shown in the shaded area A in FIG. 5 is not observed. In the embodiment shown in FIG. 1, the intake fan 15 is
Although the case where the intake fan 15 is installed inside the combustion chamber 11 has been described, the intake fan 15 can be installed anywhere as long as the draft force inside the combustion chamber 11 can be suppressed.For example, as shown in FIG. A similar effect can also be obtained by means of suppressing the draft force by sucking the air in the tank.

Effects of the Invention As is clear from the above description, according to the present invention, by providing a draft force suppressing means that works in conjunction with the wick adjusting means and reduces the draft force generated in the combustion cylinder, it is possible to suppress the sudden change from weak combustion to strong combustion. Excessive combustion and the generation of CO3 soot can be suppressed, and a safe and comfortable combustion device without any sense of danger can be obtained.

[Brief explanation of the drawing]

Fig. 1 is a cross-sectional view of a main part of a liquid fuel combustion device according to an embodiment of the present invention, Fig. 2 is a characteristic diagram showing the effects of the device, and Fig. 3 is a cross-sectional view of a main part of another embodiment of the present invention. , FIG. 4 is a sectional view of a main part of a conventional combustion device, and FIG. 5 is a characteristic diagram of the conventional example. 1...Light wick, 2...Tank part, 3...
... Combustion cylinder, 14 ... Core adjustment means, 15.
...Draft force suppression means. Agent's name Patent attorney Toshio Nakao Haka 1 person figure weak - string suppression figure / - one wick? -Tank part 3- At the boundary part 14-

Claims (1)

[Claims] A cylindrical lamp wick set vertically, a tank part for accommodating the lamp wick, a combustion tube placed above the tank part, a wick adjusting means for vertically moving the lamp wick, and a wick adjusting means. A liquid fuel combustion apparatus comprising a draft force suppressing means that works in conjunction with each other to reduce the draft force generated in the combustion cylinder using a fan or the like.