JPH0217766B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wick type oil combustor used for space heating, heating, drying, etc.

PRIOR TECHNOLOGY Numerous lamp-type oil combustors having a flat lamp wick and a flat combustion chamber have been proposed in the past (for example, Publication of Utility Model Publication No. 14885-1985, Publication of Japanese Patent Publication No. 28050-1981), but the combustion The chamber has a flat cylindrical structure with no difference in thickness.

Problems to be Solved by the Invention In the conventional combustor described above, the following problems occur particularly at the time of ignition. That is, in a so-called linear combustor having a flat combustion chamber, flame and high-temperature exhaust gas have a characteristic of concentrating in the center. During steady combustion when fuel vaporization is sufficiently large, fuel, air, or combustion gas fills the combustion chamber and this concentrated state is easily avoided, but if fuel vaporization is small immediately after ignition, the rising air flows into the combustion chamber. It is concentrated only in the longitudinal central part, and the side parts conversely cause outside air to flow down, leading to significant standing flame combustion that generates soot. Therefore, in the transient state from ignition to steady combustion, soot, odor, This resulted in continued incomplete combustion producing carbon monoxide, etc.

The present invention solves the above-mentioned conventional drawbacks, and achieves steady combustion from ignition while maintaining rapid and complete combustion in a linear combustor, and achieves uniform combustion distribution over the entire width of the combustion chamber even during steady combustion. This ensures complete combustion and maintains uniform heating of the red-hot part.

Means for Solving the Problems The technical means of the present invention for solving the above problems are as follows:
A narrow part is provided in the flat combustion chamber with a red-hot part at the top, which spans two stages: the lower end of the red-hot part and the upper part of the tip of the wick.

Effect: With the above means, even immediately after ignition when the amount of fuel vaporized is small, the air-fuel mixture is quickly filled in the combustion chamber space below the narrow part due to the resistance to the upward airflow by the narrow part, and is concentrated in the central part of the combustion chamber. This phenomenon is avoided and uniform combustion is ensured over the entire length, and steady combustion can be achieved without generating odor or carbon monoxide.Furthermore, this flame concentration is prevented even during steady combustion. There is no uneven distribution of air-fuel mixture concentration, ensuring uniform complete combustion and at the same time uniform heating of the red-hot part.

Embodiment An embodiment of the present invention will be described below based on the accompanying drawings.

In the figure, reference numeral 1 denotes a flat lamp wick, which is provided with a rack 2 on its lower side and is engaged with a pinion 4 that is interlocked with an operating knob 3 to move up and down in a wick passage 5. A horizontally long flat combustion chamber 7 in which a large number of small-diameter air holes 7a and large-diameter air holes 7b are bored at appropriate intervals is mounted on a fire pan 6 provided at the upper end of the wick passage 5. is surrounded by an outer cylinder 8. Large diameter air hole 7
The upper front surface of the combustion chamber 7, in which the holes b are densely perforated and the aperture ratio is large, is a red-hot part 9.
A window 10 having a glass plate 10a is disposed in the outer cylinder 8 facing the.

Here, in the combustion chamber 7, an upper pressure equalizing plate 11 is provided near the lower end of the red-hot part 9, and a lower pressure equalizing plate 12 is provided near the tip of the lamp wick 1.
It is equipped with two protrusions, each with a narrow part 11.
a, 12a are formed.

The operation of the above configuration will be explained next.

When the tip of the lamp wick 1 ignites at the time of ignition, the flame spreads along the entire length of the lamp wick 1, promoting vaporization of the fuel. The vaporized fuel, air flowing in from the air hole 7a near the lamp wick 1, combustion exhaust gas, etc.
The ventilation force (draft) generated in the combustion chamber 7 creates an upward air current. Since the lower part of the combustion chamber 7 becomes a semi-closed space, the pressure of the air-fuel mixture expanded by the combustion heat also acts in the lateral direction (in the longitudinal direction of the combustion chamber 7), and the mixed gas quickly moves to the lower part of the combustion chamber 7. This ensures a uniform combustion state over the entire length near the wick 1. Therefore, there is no deviation in the amount of fuel vaporized from the lamp wick 1 in the longitudinal direction, and the amount of vaporization increases quickly, so the time required to reach stable combustion is significantly shortened, and the transient combustion state at the time of ignition is shortened. restrained by time. In this way, significant flame concentration and non-uniform combustion near the wick are prevented, and rapid and comfortable ignition performance is achieved without generating unpleasant or harmful substances such as soot, odor, or carbon monoxide. Obtainable.

On the other hand, above the upper pressure equalizing plate 11, the narrow part 11
Since the air-fuel mixture rising through point a is sufficiently averaged in the longitudinal direction, the subsequent combustion flame does not concentrate in the center, ensuring a uniform combustion state over the entire width of the combustion chamber 7, and preventing carbon monoxide and Complete combustion without generating odor, soot, etc. can be obtained, and uniform heating of the red-hot part 9 can be satisfied, and a high rate of radiant heat can be provided to the front surface through the window 10.

Note that the smaller the upper half-closed space is, the more effective it is for flame expansion near the lamp wick 1, and the more effective the upper narrow part 11a or 11b is for equalizing upper combustion. be. Therefore, by providing the lower pressure equalizing plate 12 near the tip of the lamp wick 1 and the upper pressure equalizing plate 11 near the lower end of the red-hot part with a large aperture ratio, both of the above effects can be achieved.

Also, here, both the upper and lower pressure equalizing plates 11 and 12 are made of metal plates, but if slit-shaped grooves are provided at appropriate locations to prevent thermal deformation, deformation can be prevented without impairing the pressure equalizing effect. Alternatively, thermal deformation can be avoided if it is made of a ceramic material that is heat resistant and has a small coefficient of thermal expansion, such as alumina.

Effects of the Invention As described above, the present invention provides a two-stage narrow part at the lower end of the glowing part and the upper part of the tip of the wick in the flat combustion chamber having the red-hot part at the upper part, thereby directing the flame toward the center of the combustion chamber at the time of ignition. By preventing concentration and achieving uniform combustion near the wick, it is possible to quickly shift to steady combustion while preventing the generation of soot, odor, carbon monoxide, etc., and to achieve uniform combustion over the entire width of the upper flame during combustion. This ensures uniform heating of the red-hot part while maintaining stable and complete combustion, and increases the amount of radiant heat dissipated.

[Brief explanation of drawings]

The figure is a longitudinal sectional view of an oil combustor according to an embodiment of the present invention. 1... Lamp wick, 7... Combustion chamber, 9... Red-hot part, 1
1...Upper pressure equalizing plate, 12...Lower pressure equalizing plate, 11a, 1
2a...Narrow area.

Claims (1)

[Scope of Claims] 1. A combustion chamber having a flat shape with a large number of air holes bored in a side wall, a flat lamp wick whose tip is exposed at the bottom of the combustion chamber, and an outer cylinder surrounding the combustion chamber. A red-hot part with a large aperture ratio is biased in the upper part of at least one side flat part of the combustion chamber, and a window equipped with a heat ray transmitting body is disposed in the outer cylinder facing the red-hot part, and In the room, near the lower end of the red heat,
An oil combustor having a two-stage narrow section near the top of the tip of the wick. 2. The oil combustor according to claim 1, wherein the narrow portion is made of a heat-resistant material such as metal or ceramic that protrudes from the side wall of the combustion chamber.