JPS61119906A - Burning device - Google Patents

Abstract

PURPOSE:To maintain the excellent burning characteristics even when a burning quantity is throttled and to extend the burning quantity adjusting range by a method wherein throttling parts are provided at the top end part of a red-hot part and the upper part of an inner flame cylinder in a petroleum stove and the like, the throttling part of the inner flame cylinder is arranged at the higher position than that of an outer flame cylinder. CONSTITUTION:In case of large burning quantity, a flame is held shown by a mark f1 at a throttling part A16 on the top end of a red-hot part 9 at the outer fame cylinder side, and the secondary flame formed on the secondary flame port 23 is held at a throttling part B22 at the inner flame cylinder side. In this case, a strong and stabilized flame is formed in the vicinity of the throttling parts A, B surfaces due to the swirl generation. Since the throttling part B22 is arranged at higher position than that of the throttling part A16, a burning gas flow is directed outward at the outlet of a burning chamber 8, the flame is also directed outward, accordingly, the flame is prevented from the ununiformity caused by convergence. In case of small burning quantity, when the flame length becomes shorter shown by a mark f2, the air flowing resistance at the air hole 17 is decreased, the air flowing quantity passing through the air hole 17 is increased. At this time, the sir flowing quantity through a through-hole 7b is decreased, accordingly, the secondary flame f2 is held under stabilized condition.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to combustion devices such as oil stoves and oil stoves used as home heaters.

The fuel is burned in the combustion chamber C formed between the incandescent body B
was heated to red heat, and radiant heat was obtained through a transparent cylinder. A secondary flame ring E was fixed to the upper end of the incandescent body B to hold the upper end of the transmission barrel. In normal combustion, a secondary flame F1 is formed between the end of the inner flame tube AJ and the secondary flame ring E, and the secondary flame is supplied from the through hole of the incandescent body B and the air hole G of the inner flame tube as shown by the arrow. Stable combustion was maintained by air. However, when combustion is performed with a combustion amount smaller than normal combustion, there are the following problems, and the combustion amount adjustment range cannot be set very wide.

(1) When the combustion amount is reduced, the secondary flame F1 becomes flame F2
The flame F falls into the combustion chamber C as shown (indicated by the broken line), and the flame F
A large amount of secondary air hits the side of F2 as shown by the arrow, and the flame F2 is cooled, so the combustion reaction is suppressed and the combustion exhaust gas is released without the combustion reaction being completed. Occurs in large quantities.

(2) Flame held by incandescent body B on combustion chamber C side and inner flame tube A
The flame held in the air hole H gradually disappears from above the combustion chamber C when the amount of combustion becomes small, and after that it becomes a mere passage hole for air, so the secondary flame is cooled by the air and the flame is maintained. The flame becomes unstable and combustion worsens.

Problems to be Solved by the Invention The present invention solves the above-mentioned problems, improves the combustion characteristics even when the combustion amount is reduced, and expands the combustion amount adjustment range.

Means for Solving the Problems The present invention provides a constriction part on the combustion side at the upper end of the red-hot part, and a constriction part on the combustion chamber side at the top of the inner flame tube, so that the constriction part of the inner flame tube is connected to the outer flame. It is set at a higher position than the constriction part of the cylinder.

Providing the action restrictor increases the ventilation resistance of the combustion gas rising inside the combustion chamber, and the flow path of the combustion exhaust gas is bent by the restrictors provided in the inner and outer flame tubes, so that the flow of fuel and air is reduced. Better mixing and more even flame. In addition, by creating a vortex at the end of the constriction, the flame holding power at the end of the constriction is strengthened, which prevents the flame from falling into the combustion chamber even when the combustion amount is reduced, and the flame is retained at the constriction. Therefore, the combustion characteristics are less likely to deteriorate.

EXAMPLE Hereinafter, an example of the present invention will be described based on FIGS. 1 and 2.

Reference numeral 1 denotes an inner flame tube, 2 an outer flame tube, and 3 an outer tube. The three are arranged in a substantially concentric circle from the inside in order and assembled by a cross pin 4. Reference numeral 5 denotes a transmission tube made of heat-resistant glass placed on the outer tube 3. The inner flame tube 1 and the outer flame tube 2 each have a large number of air holes 6a, 7a, and air is introduced into a combustion chamber 8 formed between the two to perform combustion. The upper part of the outer flame cylinder 2 is made of a wire mesh or a punching plate, etc., and has many through holes 7.
The red-hot part 9 is formed by the combustion heat, and the red-hot part 9 is
is made red hot and radiant heat is obtained through the transmission tube 5.

10 is a core guide tube, 11 is a core outer tube, the upper ends of which form an inner flame tray 12 and an outer flame tray 13, respectively;
The outer flame tubes 2 are placed respectively. 14 is a core guide tube 1o;
The lamp wick is vertically movably housed between the wick outer tubes 11, and during combustion, its upper end is exposed in the combustion chamber 8, and the amount of combustion is adjusted by changing the exposed area. A secondary flame ring 15 is placed on the upper end of the red-hot part 9, and this secondary flame ring has a constricted part Ate that protrudes toward the combustion chamber side. Furthermore, the secondary flame ring 15 has a large number of ventilation holes 17 leading from the space between the red-hot part 9 and the permeable part 5 to the upper part of the combustion chamber 8 in the constricted part A1.
6 and above. This ventilation hole 17 and the through hole 7b of the incandescent body 9 are separated by a constricted portion A16. A flame holding ring 20 having an inclined portion 19 so as to form a gap 18 is mounted on the secondary flame ring 16 . Reference numeral 21 denotes an inner flame tube top plate, and its end portion forms a constricted portion B22 toward the combustion chamber side. The aperture part B22 is set at a higher position than the aperture part A16. Reference numeral 23 denotes a secondary flame port provided at the largest stage of the air holes of the inner flame tube, which has a larger opening than the lower air hole 6a and is located directly below the constriction portion B22. 24 is a top ring that holds the transmission tube 5.

In the above configuration, when the lamp wick 14 is ignited, combustion starts, and high-temperature combustion gas due to combustion rises in the combustion chamber 8, resulting in an upward airflow and the air necessary for combustion flowing into the inner flame tube.
, each air hole 6a of the outer flame cylinder 2.

7a, through hole 7b of red-hot part 9, ventilation hole 17 of secondary flame ring
, flows in from the secondary flame port 23. The wick is also supplied with airflow and the heat of the flame held in each air hole to evaporate the liquid fuel and continue combustion.

If the amount of combustion is large, the flame will be
On the outer flame cylinder side, the flame is held in the constricted part A16 at the upper end of the red-hot part 9, and on the inner flame cylinder side, the secondary flame formed in the secondary flame port 23 is held in the constricted part B.
The flame is held at 22. In this case, vortices are generated near the end faces of the constricted portions A and B, so that a strong and stable flame is formed.

Furthermore, the ventilation resistance in the combustion chamber a is increased due to the constricted portions A and B, and since the flow path of the combustion gas is bent, the unburned gas and air are mixed better, and the flame becomes uniform.

In addition, a large amount of air is supplied from the secondary flame port 23 to create a large flame, and the ventilation hole 17 of the secondary flame ring 15
Air is also supplied to the flame through the gap 18, which is more effective in making the flame uniform.

In addition, by removing air from the vent hole 17, the flow of combustion gas is directed slightly outward, increasing the temperature above the incandescent body 9, thereby increasing the luminance of the incandescent body 9 and making it uniform. The throttle part B22 on the inner flame tube side is set at a higher position than the throttle part A18 of the secondary flame ring, so the flow of combustion gas is directed outward at the exit of the combustion chamber 8, and the flame is also directed outward. Therefore, the flame does not converge, elongate, or become uneven. Next, when the combustion amount is small, as the flame length becomes shorter as shown by f2 (indicated by the broken line), the ventilation resistance of the vent hole 17 of the secondary flame ring 15 decreases, and the amount of air passing through the vent hole 17 increases.

At this time, the amount of air from the through hole 7b in the upper part of the red-hot part 9 decreases, and the flame holding of the secondary flame f2 is stabilized. Also, the aperture parts A and B
Since the ventilation resistance in the combustion chamber 8 increases, the unburned gas and air are mixed well, and since a premixed state is maintained, good blue flame combustion can be maintained.

In addition, vortices are generated near the end faces of the throttle parts A and H, making the flame holding strong, which prevents the secondary flame f2 from falling into the combustion chamber and holds the secondary flame in the throttle parts A and B. This can prevent deterioration of combustion characteristics.

Effect of the invention According to the combustion apparatus of the present invention, the following effects can be obtained.

(1) By forming a constriction part on the combustion chamber side at the upper end of the red-hot part and the upper end of the inner flame cylinder, a vortex is formed near the constriction part and flame holding is strongly formed, thereby reducing the combustion amount. However, the flame does not fall into the combustion chamber, and the combustion characteristics do not deteriorate.

(The two throttle parts increase the ventilation resistance inside the combustion chamber,
Furthermore, since the flow path of the combustion gas is bent, the unburned gas and air are better mixed, the flame becomes uniform, and the combustion characteristics are improved.

(3) By setting the constriction at the top end of the inner flame cylinder at a higher position than the constriction at the top end of the red-hot section, the direction of the secondary flame is directed outward, which causes the flame to converge, elongate, or become uneven. The combustion characteristics are improved because a uniform secondary flame can be formed.

[Brief explanation of the drawing]

Ru. 1... Inner flame tube, 2... Outer flame tube, 3...
...Outer tube, 7b...Through hole, 8...
Combustion chamber, 9... Red-hot body, 15... Secondary ring, 16... Throttle part A117...
Ventilation hole, 22... Throttle part B123...
Secondary sore. Name of agent: Patent attorney Toshio Nakao Haka 1st person
1 cause l internal fire

Claims (3)

[Claims] (1) An inner flame tube and an outer flame tube having a large number of air holes are arranged approximately concentrically in order, and the upper end of the red-hot part provided on the upper part of the outer flame tube and the inner flame tube A combustion device in which the upper end is provided with a constriction part that protrudes toward the combustion chamber side formed between the inner flame tube and the outer flame tube, and the constriction part on the inner flame tube side is set higher than the constriction part on the red-hot part side. . (2) A ventilation hole leading from the space between the transmitting cylinder placed on the outer cylinder and the incandescent body to the upper part of the combustion chamber is separated from the through hole provided in the incandescent part and is connected to the constriction part on the incandescent part side. A combustion device according to claim 1 provided above. (3) A secondary flame port having a larger opening than the air holes in the other parts of the inner flame cylinder is provided directly below the throttle part on the inner flame cylinder side.
The combustion device according to item 1 or 2.