JPH0129370Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a kerosene stove in which a double-tube type combustion tube is formed by an inner flame tube, an outer flame tube, and a glass outer tube, and the red heat of the outer flame tube is visible through the glass outer tube. be.

Conventional kerosene stoves of this kind, for example,
- As seen in Publication No. 45876, a primary air hole consisting of a circular hole with a diameter of about 3 mm to 4 mm or a square hole with a size equivalent to the hole area is made in the red-hot part of the outer flame tube, thereby making it possible to connect the inner flame tube and the outer flame. A part of the combustion gas rising between the tubes flows out to the surface of the outer flame tube through the primary air hole, forming a flame on the surface of the outer flame tube, thereby reducing the temperature of the outer flame tube surface to about 850℃. It was designed to have both an excellent heating effect and a visual effect through the glass outer cylinder. However, in this case, the primary air hole of the inner flame cylinder facing the red-hot part of the outer flame cylinder is a small hole with a diameter of about 1.6 mm, so the surface temperature of the inner flame cylinder is 700℃ compared to the red-hot part of the outer flame cylinder. As a result, the darkness of the inner flame tube was noticeable through the primary air holes of the outer flame tube, and the radiation efficiency was also reduced.

The present invention has been made to further improve the above-mentioned drawbacks, and specifically, the primary air hole of the inner flame tube facing the red-hot part of the outer flame tube is shaped like a horizontally long slit, and one of the slits is shaped like a horizontally long slit. The area of each is equal to or larger than the area of each primary air hole provided in the red-hot part of the outer flame tube,
This raises the temperature of the inner flame cylinder higher than before,
Furthermore, it is designed to have both excellent heating effects and visual effects.

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2 of the drawings. 1 is an oil tank, 2 is a core guide cylinder, 3 is a core outer cylinder, and 4 is both these cylinders 2, 3. The wick is inserted between the oil tank 1 and the lower end thereof is immersed in oil in the oil tank 1, and these are well known. Reference numeral 5 denotes a double-tube type combustion tube, which includes an inner flame tube 6 placed on the upper end flange surface of the core guide tube 2, an outer flame tube 7 and an outer flame tube 7 placed on the upper end flange surface of the core outer tube 3. The glass outer cylinder 8 is provided on the outside facing the red-hot part of the glass outer cylinder 8, and a lower outer cylinder 9 supports the glass outer cylinder 8.

In addition, the inner flame tube 6 and the outer flame tube 7 are provided with primary air holes 6a, 7a of about 1.3 mm in diameter at their lower portions, and the outer flame tube is provided with 7 is a primary air hole 7b which is a circular hole with a diameter of about 3 mm to 4 mm, similar to the conventional one.
The inner flame tube 6 is provided with primary air holes 6b which are horizontally elongated slits and each of which has an area equal to or larger than the primary air holes 7b.

The present invention has the above-mentioned structure, and its operation will be explained next. When the wick 4 is ignited, the air that flows in from the air holes 6a and 7a at the bottom of the inner flame tube 6 and the outer flame tube 7 causes the wick to ignite. A thermal reaction occurs, breaking down the kerosene vapor into hydrocarbons with a lower number of carbon atoms. Further, when reaching the primary air hole 7b of the red-hot part of the outer flame tube facing the glass outer tube 8 and the primary air hole 6b of the inner flame tube 6, the combustion gas A part of the primary air hole 7
b, flows out to the surface side of the outer flame tube 7, forms a flame on the surface side, and raises the temperature of the outer flame tube to about 850°C, and also in the inner flame tube 6, a horizontally long slit-shaped primary air hole 6b is formed. is the primary air hole 7 of the outer flame tube 7
The inner flame cylinder 6 is equal to or larger than b.
A large amount of air flows in from the inside of the flame cylinder 6, causing rapid combustion and increasing the temperature of the inner flame cylinder 6. This allows radiant heat to be dissipated from the entire combustion tube, and
The red heat of the outer flame tube 7 can be seen through the glass outer tube 8, and the red heat of the inner flame tube 6 can be seen through the primary air hole 7b of the outer flame tube 7, improving the visual effect. According to experiments, the slit-shaped primary air hole 6b is
By setting the width to 0.8 mm and the width to 20 mm, the temperature of the inner flame tube 6, which previously only rose to about 700℃, has been reduced.
It was possible to raise the temperature to about 770℃.

Also, according to this experiment, by setting the vertical width W of the slit to within 1 mm, the air flowing in from the slit was given speed, and a flame was formed at a location slightly away from the edge of the slit. This made it possible to uniformly heat the inner flame tube 6 to red heat.

If the vertical width W of the slit is increased to 1 mm or more, the flame will adhere to the edge of the slit, and only the edge of the slit will be abnormally heated due to heat received from the flame.
A red heat unevenness occurs between the area and other parts.

In addition, since the width of the air ejected from the slit becomes wider, the mixture of gas and air becomes uneven, resulting in an excess of O ₂ in the center of the air layer ejected from the slit, inhibiting the so-called hydroxylation reaction, and free carbon. It develops into a yellow flame.

This phenomenon is the same even when the primary air hole 6b is changed to a slit shape and is made into a circular hole of approximately the same size as the primary air hole 7b of the outer flame tube 7.

Furthermore, if the size of the primary air hole 6b is made smaller than the primary air hole 7b of the outer flame tube 7, the temperature rise in the inner flame tube 6 will be suppressed due to lack of air, as in the conventional case, which is not preferable.

As explained above, the present invention has the primary air hole of the inner flame tube facing the red hot part of the outer flame tube in the shape of a horizontally long slit, and the area of each slit is the primary air hole provided in the red hot part of the outer flame tube. By making the air hole the same size or larger, it is possible to raise the temperature of the inner flame tube and improve the red heat.Compared to conventional ones, it not only improves the visual effect through the glass outer tube, but also improves the radiation. It has the advantage of increasing effectiveness.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view of a kerosene stove according to the present invention, and FIG. 2 is a perspective view of the main parts thereof. In the figure, 6 is an inner flame tube, 6b is a slit-shaped primary air hole, 7 is an outer flame tube, and 8 is a glass outer tube.

Claims (1)

[Claims for Utility Model Registration] (1) The inner flame tube 6, the outer flame tube 7, and the glass outer tube 8 form a double-tube-shaped combustion tube 5, and the outer flame tube 7 is passed through the glass outer tube 8. In a double-tube kerosene stove that emits red heat, the primary air hole 6b of the inner flame tube 6 facing the red-hot part of the outer flame tube 7 is shaped like a horizontally long slit, and the area of each slit is equal to the outer flame tube. Primary air hole 7 provided in the red hot part of 7
A kerosene stove characterized by having an area equal to or larger than the area of item b. (2) A kerosene stove as set forth in claim 1 of the utility model registration claim, in which the vertical width W of the slit is 1 mm or less.