JPS62705A - Combustion device - Google Patents

Abstract

PURPOSE:To expand an adjusting range of combustion amount and enable a red-heated condition of a red-heated part to be held under a superior state by a method wherein secondary flame ports having specific air holes are arranged at an inner flame cylinder at an upper end of a primary combustion chamber and a flame holding part projected inwardly from the outer flame cylinder at substantially the same height as that of the secondary flame ports or slightly below them is arranged. CONSTITUTION:Hot combustion gas under a combustion operation ascends through a primary combustion chamber 8 to generate a thermal draft and a flame Fr is formed between the flame holding part 21 and the secondary flame ports 12. In this case, since the air holes in the secondary flame ports 12 have a larger diameter than the air holes 11 in the inner flame cylinder 6 and closely collected, so a large amount of air is supplied upwardly in the inner flame primary combustion chamber 8. Therefore, the flame Fr, even if it shows an excessive combustion, shows less generation of yellow flame and no generation of soot. Since the flame holding part 21 is projected into the primary combustion chamber 8, an aeration resistance in the primary combustion chamber 8 becomes high and an amount of air flowing into the chamber is restricted. Therefore, even in case that an amount of combustion is restricted, the flame Fr is prevented from being dropped into the primary combustion chamber 8, with the result that a deterioration of the ignited exhaust gas can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to a combustion device used for home heating and the like.

BACKGROUND OF THE INVENTION Conventionally, this type of combustion device has a lamp wick 1 exposed in a combustion chamber C formed between an inner flame tube 6 and an outer flame tube 7 having a large number of air holes 11, as shown in FIG. This vaporizes and burns the fuel. Normally, the outer flame cylinder 7 has a red-hot part 15 in which the opening surface of the air hole 16 is considerably enlarged above the constricted part 14 of the outer cylinder 9, and a large amount of air flows from this air hole 16 into the primary combustion chamber 8. Air was introduced, mixed with the fuel vaporized from the lamp wick 1, and burned, making the red-hot part 15 red-hot and obtaining radiant heat.

Problems to be Solved by the Invention However, the above configuration has caused various problems as described below.

(1) In normal combustion, a secondary flame f1 is formed between the upper ends of the inner flame tube 6 and the outer flame tube 7, but if excessive combustion occurs, the secondary flame 11 becomes yellow due to lack of air. In extreme cases, a large amount of sunu may occur.

(2) When the exposed height of the lamp wick 1 is lowered to reduce the amount of heat generated, the flame descends into the primary combustion chamber 8 and is formed as shown at f2. In this case, the air holes 11.1 of the inner and outer flame tubes 6.7
The flame f3 that was formed at 5 is no longer formed above the flame f2, and a large amount of air is guided in the direction of arrow a because the ventilation resistance is reduced. Therefore, the tip of the flame f2 and the vicinity of the contact point between the inner and outer flame tube 6.7 and the flame f2 are cooled, so the combustion reaction is suppressed here, and the combustion exhaust gas is released without the combustion reaction being completed. Carbon oxide emissions will increase rapidly. In addition, the red glow brightness at the red hot part and near the edges was also reduced, which was a problem in terms of appearance.

The present invention has been made to solve these conventional problems, and aims to provide a combustion device in which the combustion amount can be adjusted over a wide range and the red-hot state of the red-hot section is also good.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion apparatus of the present invention has an inner flame cylinder at the upper end of the primary combustion chamber formed between the inner and outer flame cylinders, which has other air holes vertically and horizontally. A secondary flame opening consisting of a group of air holes with small air hole intervals and large diameter is provided, and the secondary flame opening protrudes inward from the outer flame tube at approximately the same height as or slightly below the secondary flame opening. It is structured as follows.

Effect: With the above-described configuration, the present invention can subdivide a large amount of air from the secondary flame port and supply it to the upper part of the primary combustion chamber, and also generate a thin flow in the flame stabilizing part to firmly hold the flame. I can do it.

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a cylindrical lamp wick, which is set between an inner wick tube 2 and an outer wick tube 3 so as to be freely movable downward. The ends of the inner core tube 2 and the outer core tube 3 form an inner flame tray 4 and an outer flame tray 5, respectively, and an inner flame tube 6 and an outer flame tube 7 are placed thereon. During combustion, the two ends of the wick 1 are exposed in a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where the fuel is vaporized. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are arranged in a substantially concentric circle in order from the inside, and are integrated and fixed by two clonupins 1o. Reference numeral 11 indicates a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7. Reference numeral 12 denotes a secondary flame port formed in the inner flame tube 6 at the upper end of the primary combustion chamber 8, and the vertical and horizontal air hole intervals are smaller than those of other inner flame tube air holes.
It also has large diameter and densely packed air holes. Also, this secondary flame opening is set so that the air holes at the top and bottom have a large diameter. In this embodiment, the secondary flame port 12 is arranged vertically in four directions.
It is formed by a group of air holes in stages, and is divided into two stages, upper and lower, with the lower two stages having a larger diameter, but it is also possible to divide it into certain areas like this and change the diameter, or to gradually decrease the diameter from the bottom. It may also be used as a configuration. Reference numeral 13 denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6. The outer flame tube 7 on the side from the throttle part 14 of the outer tube 9
A red-hot part 15 is formed in the hole, and a large through hole 16 is provided. Reference numeral 17 denotes a transparent tube made of a transparent material such as glass, and is placed on the outer tube 9. 18 is red hot part 15
This is a top ring provided so as to shield the air passage 19 between the transmission tube 17 and the transmission tube 17. Reference numeral 20 denotes a ventilation hole leading from the air passage 19 to the upper part of the primary combustion chamber 8. 21 is the secondary flame opening part 12
This is a flame-holding part that protrudes inward from the red-hot part 15 of the outer flame tube 7 at approximately the same height as or slightly below, and is formed integrally with the top ring 18 in this embodiment.

In the above configuration, when the lamp wick 1 is ignited, combustion starts,
High-temperature combustion gas from combustion rises in the primary combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows through the air holes 11 of the inner flame tube 6, the outer flame tube 7, and the through holes 16 of the red-hot part 15.
The fuel is then supplied into the secondary combustion chamber 8 and combustion continues. Second
As shown in the figure, a flame F is generated between the flame holding part 21 and the secondary flame opening part 12.
is formed. In this case, the air holes in the secondary flame port 12 have a larger diameter than the air holes 11 in the inner flame tube 6 and are densely packed together, so a large amount of air is supplied above the inner flame secondary combustion chamber 8. Flame Fr is less likely to run out of air, and even if it is over-combusted, little yellow flame is generated and no soot is generated. In addition, since the flame holding part 21 protrudes into the primary combustion chamber 8, the ventilation resistance in the secondary combustion chamber 8 increases, and the amount of air flowing into the primary combustion chamber 8 from the through holes 16 and air holes 11 is suppressed. It will be done.

Therefore, the combustion amount in the secondary combustion chamber 8 can be reduced by 2, and even if the combustion amount is limited, the flame Fr is prevented from falling into the primary combustion chamber 8, so deterioration of combustion exhaust gas can be suppressed. . Furthermore, when the combustion amount is reduced as shown in Fig. 3, the flame becomes small like F8, but since the secondary flame port 12 is subdivided into dense air holes, the flame is spread through the upper air holes. The flame gradually disappears, but the flame remains below. In particular, in this embodiment, the secondary flame port 12 is divided and the air holes in the upper region 12a and lower region 12b are made larger, so that the flame in the upper region 12a becomes unstable as shown in FIG. Even if the flame is extinguished, the flame can be relatively stably maintained in the lower region 12b having a large pore diameter. In addition, flame holding part 2
Since a vortex is generated near the end of 1, it is effective in holding the flame firmly. Therefore, even when the combustion amount is reduced, while the flame Fs is cooled, the upper part of the red-hot part 15 is not cooled, and deterioration of the combustion exhaust gas can be prevented.

Furthermore, since the incandescent body 15 can be kept at a high temperature, a good incandescent state can be maintained over a wide adjustment range of combustion amount, and large radiation can be obtained.

In this embodiment, only the structure shown in FIG. 1 has been described, but other embodiments include one having a secondary combustion chamber 22 on the side of the primary combustion chamber 81 as shown in FIG. Similar effects can also be obtained with a structure having a secondary combustion chamber 22 and an upper incandescent body 23 within the secondary combustion chamber 22, as shown in FIG.

In addition to the effects of the invention, the combustion apparatus of the present invention provides the following effects.

(1) The diameter of the secondary flame port is larger than that of other air holes, and the vertical and horizontal air hole spacing is small and dense, making it possible to supply a large amount of air to the secondary combustion chamber. Therefore, even if excessive combustion occurs, it is possible to suppress the occurrence of yellow fire and sunu.

(2) The secondary flame nozzle is a finely divided dense air hole, so the combustion amount is reduced and the flame becomes small, so even if the flame in the upper area of the secondary flame nozzle is extinguished, the flame in the lower area is still maintained. Since the flame is maintained and the flame is prevented from falling, deterioration of combustion exhaust gas can be prevented.

(3) A vortex is formed in the vicinity of the end of the flame stabilizing section to firmly hold the flame, which is more effective in preventing the flame from falling into the combustion chamber.

(4) Since the flame holding part protrudes into the primary combustion chamber, the ventilation resistance within the combustion chamber increases, and the amount of air flowing into the secondary combustion chamber is suppressed, reducing the amount of combustion in the secondary combustion chamber. Therefore, even when the combustion amount is reduced, it is possible to prevent the flame from falling into the primary combustion chamber.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a main part of a combustion device according to an embodiment of the present invention, FIGS. 2 and 3 are enlarged cross-sectional views of the same main part, and FIGS.
The figure is a sectional view of a main part of a combustion device according to another embodiment, and FIG. 6 is a sectional view of a main part of a conventional combustion device. 6... Inner flame tube, 7... Outer flame tube, 8...
...-Next combustion chamber, 9... Outer cylinder, 11...
...Air hole, 12...Secondary flame opening, 17...
...Transmission tube, 21...Flame holding part. Name of agent: Patent attorney Toshio Nakao and 1 other person6.
・1 ■ End 7・1. Cutting pipe 8...-> Missing combustion chamber 12...Bifurcated flame opening Fig. 2 Fig. 3 Fig. 4 Fig. 5

Claims (2)

[Claims] (1) An inner flame tube and an outer flame tube having a large number of air holes and arranged approximately concentrically, an outer flame tube located outside the outer flame tube, and an outer flame tube placed on the outer flame tube. An air hole that is provided in the inner flame tube at the upper end of the primary combustion chamber formed between the transmission tube, the inner flame tube, and the outer flame tube, and has a smaller vertical and horizontal air hole interval and a larger diameter than other air holes. A combustion device comprising a secondary flame port consisting of a group, and a flame stabilizing portion protruding inward from the outer flame cylinder side at approximately the same height as or slightly below the secondary flame port. (2) The combustion device according to claim 1, wherein the secondary flame port is formed of a group of air holes whose diameter is larger at the bottom than at the top.