JPS5929907A - Burner - Google Patents

Abstract

PURPOSE:To maintain a stable combustion condition even when a device is brought to a low combustion quantity state, by a method wherein distances between the upper and the lower parts of an inner and an outer flame cylinder are different from each other, and a fine air hole group is formed in the lower part of either the inner or the outer flame cylinder. CONSTITUTION:A flame produced by the ignition of a wick 18 spreads in a peripheral direction, and when the flame is moved upward by the air from fine air hole groups 9 and 10, vaporization of the fuel, simultaneously, is promoted and concentration of the fuel in a space 8 increases gradually. The flame is moved to a space above a burner port part 11 and an inner and an outer flame cylinder and is shifted to a constant combustion condition, but in case a combustion quantity is large, the quantity of the air fed in a combustion space 5 becomes adequate to show an excellent combustion condition. Further, even where the space 8 is narrow, the air hole groups 9 and 10 in a peripheral wall are of a small pore, and a combustion quantity is reduced thereby, the flame is difficult to form and is formed on a burner port plate 11. As a result, the flame formed on the burner port plate 11 or within the space 8 has a high premixture degree, and the less a combustion quantity is, the more the premixture degree increases, whereby the short flame having a high combustion speed is formed, resulting in ability to hold a stable combustion condition.

Description

[Detailed Description of the Invention] [Technical Section to which the Invention Pertains] The present invention relates to a combustion device such as a kerosene stove, and its purpose is to reduce the combustion state even when the amount of combustion is reduced. C. An object of the present invention is to provide a combustion device that generates little odor.

[Prior art and its problems]

The wick type combustion device used in kerosene stoves has many advantages, such as the ability to steplessly change the amount of combustion by simply moving the wick up and down, but if the wick is lowered too far, it can cause a bad odor. This was a big problem. Therefore, recent kerosene stoves have taken measures such as installing a stopper (enclosure) to prevent the wick from dropping below the height of the wick, but this prevents combustion.
Adjustment of tt + (There is a drawback that J becomes smaller.

[Purpose of the invention]

The present invention was developed in view of the drawback of the prior art that the combustion M (adjustment rlj) could not be adjusted properly in order to prevent the generation of bad odors in the above-mentioned wick type combustion device.The basic structure of the present invention is as follows: It consists of an outer flame tube, a flame hole section provided at a position with a different distance between the flame tubes, and a group of small π111 air holes provided below the positions with a different distance between the flame tubes.

〔Effect of the invention〕

By adopting such a structure, even when the wick is lowered from the lower part to achieve a low combustion amount, a stable combustion state Md can be achieved with little generation of bad odor.

[Embodiments of the invention]

The present invention will be described in detail below based on examples. 1st
The figure shows one embodiment of the present invention, where 1 is an outer flame tube and 2 is an inner flame tube. 3U: A relatively large diameter air hole provided in the upper part of the outer flame cylinder 1, 4 is an air hole provided in the upper part of the inner flame cylinder, and these air holes can sufficiently form a flame. It's the size. 5 is a combustion chamber space formed by the upper parts of the inner and outer flame tubes 1 and 2. 6.7 is the lower part of the inner and outer flame tubes 1.2, υThe diameter of the inner flame tube 2 becomes larger, and the diameter of the outer flame tube 1 becomes smaller, and the space 8 created by both P and # is the upper part. It is narrower than. A group of fine air holes 9.10 are provided in the lower portions 6, 7 of the inner flame cylinder 1.2, and a flame hole portion 11 is provided at the upper end of the space 8.

Reference numeral 12 denotes an outer cylinder made of a light-transmitting material that is provided concentrically around the outer periphery of the outer flame cylinder 1, and is supported by the support cylinder 13, and at the same time the gap formed between the upper end of the outer flame cylinder 1 and the upper end of the outer flame cylinder 1 is the first ceiling. Board 1
It is sealed by 4. Reference numeral 15 denotes a second top plate that seals the upper end of the inner flame tube 2, and is provided with an air hole 16 for adjusting the ratio of the amount of air flowing into the spans 5 and 8 between the inner and outer flame sections. , Furthermore, a flame holding plate 17 is attached to the upper surface of the flame holding plate 17, and the fuel suction plate 17 is attached to the exposed height of the flame holding plate 17.
There are two units, and 19 is installed inside the inner flame tube 2 for inflowing air.
It is a diaphragm plate that suppresses d. Next, the effects of the present invention will be explained in 11) based on Examples. Initially, a part of the wick 18 is ignited and formed, and the flame propagates in the circumferential direction of the wick 180, and moves upward by the air sent from the micro air holes 9 and 10 by natural convection. At the same time, the temperature of the core 18 is increased and J+'! ' = The evaporation of the fuel is promoted, and the fuel g degree in the lower space 8 of the inner and outer flame cylinders gradually increases. On the other hand, in the narrow space 8, it becomes difficult for the flame to exist stably, and the flame eventually moves above the flame hole 11 and into the space above the inner and outer flame cylinders, and transitions to a steady combustion state while making the inner and outer flame cylinder walls red-hot. . If the combustion -1r1 is too high in this steady combustion state, the temperature of the inner and outer flame cylinder walls is high, and the amount of air supplied to the combustion space 5 from each air hole by the natural couple 6 is also not appropriate. value, indicating extremely good combustion conditions.

Therefore, the amount of malodorous components in the exhaust gas is small, and the odor does not become overpowering. However, when the wick 18 is lowered to reduce the combustion rate, in a conventional combustor, a flame is formed near the lower end of the inner and outer flames and burns, but the inflow air flow at low combustion rates is generally controlled at an appropriate time. Since there is a lot of heat, the cooling effect is actually greater, and the flame is cooled near the wall, producing a lot of intermediate products that are the cause of odors. However, in the present invention, the lower space 8 of the inner and outer flame tubes 1 and 2 is narrowed, and the air hole groups 9 and 10 provided on the peripheral wall of this portion are made into micro holes with a diameter of 1 inch or less, thereby reducing the combustion amount. Even in such a case, it is difficult to form a flame in the lower space 8 of the flame tube, and most of the flame is formed on the flame hole plate 11 provided at the upper end of the space between the walls 8. Therefore, in the space 8, the air and fuel vapor flowing from the microhole group 9.10 are in a premixed state and flow into the flame hole plate 11. Therefore, the flame formed on the flame hole plate 11 or in the combustion space 8 is highly premixed and has good combustibility and is less likely to produce malodorous components. The strength of the premixing level increases as the amount of combustion decreases, so the lower the amount of combustion, the faster a short flame is formed with a faster combustion speed, making it more difficult for bad odors to be produced.

As explained above, according to the present invention, the lower interval between the inner and outer flame parts is narrowed, and a group of fine air holes is provided to create a $i/Y structure that is difficult to form a flame stably. -1
1, there is no state table that is close to premixed combustion, and when there is high combustion, there is a state that is close to diffuse combustion, and combustion is performed, so combustion - f
-tlf: Even when adjusted, incomplete combustion does not occur and generation of malodorous components can be suppressed. The structure of the present invention is not necessarily such that the upper and lower parts of the inner and outer combustion cylinders are integrally constructed, but may be separated and stacked one on top of the other.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.
It's true. 1... Outer flame tube, 2... Inner flame tube, 5... Upper combustion space, 6. Lower part of outer flame joint, 7... Lower part of inner flame tube, 8... Lower blade? 11, 'Miyakikoj
Between Te, 9.10...Lower fine air holes, 11...
・Flame stencil, 12...outer tube, 18...
·core.

Claims (2)

[Claims] (1) It has a large number of pores arranged in concentric circles. In addition to different flame tube spacing between the upper and lower parts of the outer flame tube,
A combustion device characterized in that a small group of air holes is provided in the lower part of at least one of the inner and outer flame tubes. (2) The combustion device according to item 1 of the scope of the requirements for special g'FM, characterized in that flame hole portions are provided at different positions of the inner and outer flame tubes at different intervals between the flame tubes.