JPS61202003A - Kerosene stove - Google Patents

Abstract

PURPOSE:To maintain complete combustion in a flame chamber with thermal strain being prevented, by providing a flange which is bent to the inside or the outside to the lower edge of a flame chamber, and by providing a plurality of cutouts such as on the flange. CONSTITUTION:At the time of combustion, a flame chamber 7 is transformed into nearly a fan shape of which top side is open and tends to produce a gap between the center part of wall bottom of a flame chamber 7 and a flame pan 6. Against this tendency, a flange 9 acts to prevent the wall bottom from being bent largely, as well as to prevent the air from flowing in by covering the gap between it and the flame pan 6, because both areas are contacted to each other, or by making the resistance of a flow path to the air very large. Against bending of the walls of a flame chamber 7 to the inside or the outside direction, they are mechanically reinforced by the flange 9 to keep their shapes without large deformation. Although the strain to deform the walls of a flame chamber into nearly a fan shape to the inside or the outside direction is produced by the difference in temperature in the edge of a flange 9 and the wall bottom, it can be absorbed by free opening and closing of cutouts 10 provided on the flange, and the flange 9 can closely be contacted to the flame pan 6, keeping flatness in it. At the same time the flange 9 prevents the width of an air flow path from being narrowed by the thermal strain.

Description

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

Conventional Technology Numerous wick type oil combustors having a flat wick and a flat combustion chamber have been proposed (for example,
Public Law No. 21962, etc.), all have a structure in which the upright end of the combustion chamber is placed on the fire pan.

Problems to be Solved by the Invention In the conventional combustor described above, combustion abnormalities are likely to occur due to thermal deformation of the combustion chamber during combustion.

In other words, during combustion, the combustion chamber is heated by flame and high-temperature exhaust gas, causing thermal expansion. However, in a so-called double-cylinder combustion chamber, the temperature deviation over the entire circumference is There was almost no distortion, and even when subjected to thermal expansion, the diameter of the cylinder only changed slightly, and no distortion was caused that would affect the firing process. Moreover, even if a temperature difference occurs in the vertical direction, this type of combustion chamber maintains the shape and flatness of the lower end placed on the fire pan because it is cylindrical, resulting in excellent combustion stability. However, in a so-called linear combustor that has a flat combustion chamber, if there is a temperature difference between the top and bottom, inside and outside, or between the center and the ends of the flat part that makes up the longitudinal direction of the combustion chamber, the flat part is largely curved, which tends to create a gap between the fire pan and the lower end of the flat surface. In particular, in the case where the lower end of the flat part is placed on the fire pan with its upright end surface, the above-mentioned gap directly serves as an air inlet into the combustion chamber, resulting in excess air being supplied to the fire pan, thereby reducing soot. This resulted in the generation of carbon oxides and odors. In addition, the curvature of the combustion chamber outward and outward changes the width of the flow path within the combustion chamber, causing imbalance in the air-fuel mixture and flame, resulting in incomplete combustion. This resulted in deformation of the combustion chamber wall.

On the other hand, if a flange bent inwardly or outwardly is provided at the lower end of this flat part, the contact with the fire pan changes from a line contact to a surface contact, and a sealing effect can be exhibited against some curvature of the flat part. Conversely, however, a temperature difference occurs between the tip and base of this flange, causing it to curve inward and outward. As a result, the flat portion connected to the flange is also curved, changing the width of the combustion chamber and causing uneven combustion and abnormal combustion. Therefore, the merits and demerits were mixed.

The present invention aims to eliminate the above-mentioned conventional drawbacks and maintain complete combustion while preventing thermal distortion in a linear combustor.

Means for Solving the Problems The technical means of the present invention for solving the above-mentioned problems is to provide a flange bent inwardly or outwardly at the lower end of the flat combustion chamber, and to provide a plurality of grooves, etc. on this flange. The missing part is arranged.

Effect: The above means prevents thermal deformation in the top and bottom, inside and outside of the combustion chamber, or in the center and side parts, and also suppresses air leakage between the fire pan and the lower end of the combustion chamber, so that the combustion chamber is completely heated. Can maintain combustion.

EXAMPLE Hereinafter, an example of the present invention will be described based on the accompanying drawings. In Fig. 2, 1 is a flat lamp wick, equipped with a rack 2 on the lower side, and a pinion 4 interlocked with an operating knob 3.
It engages with the core cylinder 6 and moves up and down while being held between the core cylinders 6. A horizontally long and flat combustion chamber 7 made of a perforated plate with air holes 7a is placed on a fire pan 6 provided at the upper end of the core cylinder 6, and is surrounded by an outer cylinder 8.

Here, a flange 9 bent outward is provided at the lower end of the combustion chamber 7.
is provided and is in surface contact with the fire pan part 6. Furthermore, a plurality of kerf grooves of 1° are arranged on the seven flange 9.

The operation of the above configuration will be explained next.

During combustion, the fuel vaporized from the lamp wick 1 is supplied with air from the air hole 7a in the combustion chamber 7, and is mixed and combusted.

Here, the wall surface of the combustion chamber 7 heated by the flame and high-temperature exhaust gas tries to thermally expand according to the respective temperature. is sufficiently heated to a high temperature, and due to the difference in the amount of thermal expansion, the combustion chamber 7 deforms into a substantially fan-like shape opening upward.
A gap is created between the center of the lower end of the wall and the fire pan 6. On the other hand, the flange 9 acts to prevent large bending, and since there is surface contact between the fire pan 6 and the flange 9, it covers the gap or increases the flow resistance to prevent air from flowing in. You can almost eliminate it. Furthermore, with respect to bending in the outward and outward directions, since the upright wall of the combustion chamber 7 and the flange 9 are joined at a substantially right angle, the mechanical strength is strong and it is possible to maintain the combustion chamber without significant deformation. Therefore, even if the linear combustion chamber 7 is used, stable complete combustion can be maintained without causing abnormal combustion due to excess air as in the conventional case, and without causing a large change in the width of the flow path within the combustion chamber 7.

On the other hand, in response to the temperature difference between the tip and the base of the 7 flange 9, a stress is generated in the inner and outer directions that causes approximately fan-shaped deformation similar to the above.
A plurality of 0s are provided, and the stress of the deformation described above is absorbed by the degree of freedom of opening and closing the slits 410, and the flange 9 is brought into close contact with the fire pan 6 while maintaining its flatness. Further, it is also possible to avoid a situation where this stress changes the width of the flow path in the combustion chamber 7.

In this way, the combustion chamber 7 is formed into a linear shape that is easily deformed due to temperature differences between the top and bottom, inside and outside, or between the center and the ends, thereby causing unnecessary air to flow into the fire pan 6 near the wick 1 and causing combustion abnormalities. Therefore, it is possible to exhibit preferable combustion performance without causing any combustion problems or unevenness of the flame due to deformation of the internal flow path of the combustion chamber 7.

Note that the above effect can be achieved by arranging a plurality of grooves 10 provided on the flange 9 at appropriate intervals; however,
The missing space may be very small and is actually 11III wide.
A slit-like material with a diameter of 0 or less is sufficient. Also, kerf 10
By reducing the width to the necessary minimum, it is possible to improve the adhesion with the fire pan 6 and increase the sealing effect against thermal deformation. Further, in this embodiment, the flange 9 is bent outward, but this direction may be bent inwardly or outwardly without impairing the above-mentioned effect.

Effects of the Invention As described above, the present invention provides a combustion chamber with a plurality of cutouts and a flange bent inward or outward at the lower end of the flat-shaped combustion chamber placed on the fire pan. This prevents abnormal combustion conditions due to thermal deformation of the fuel and maintains stable and complete combustion.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of essential parts of an oil combustor according to an embodiment of the present invention;
FIG. 2 is a longitudinal sectional view thereof. 1...Light wick, e...Fire pan, 7...
... Combustion chamber, 9... Flange, 1o...
...kerf (missing part). Name of agent: Patent attorney Toshio Nakao and 1 other person7-
---Burning! Figure 1 2-11 Franci''to
---tlJ groove 7----wick 2nd figure 6-tasu part 7----additional support rod 11 flange

Claims (2)

[Claims] (1) A flat wick that is held in a wick container and moves up and down,
It has a flat combustion chamber made of a perforated plate placed on a fire pan at the upper end of the core cylinder, and an outer cylinder surrounding this combustion chamber, and a flange bent inwardly or outwardly at the lower end of the combustion chamber. The oil combustor is equipped with a flange and has multiple cutouts on the flange. (2) The oil combustor according to claim 1, wherein the defective portion is formed of a slit-like groove with a small gap.