JPS61161316A - Burner - Google Patents

Abstract

PURPOSE:To improve combustion characteristics and raise safety by providing respectively a secondary flame opening section at the topmost section of an internal flame cylinder, a flame straightening section above the secondary flame ring adjacent to the secondary flame opening section of the internal flame cylinder, a vent hole in the inclining section of the secondary flame ring, and a flame retaining section at the upper end of a red hot section. CONSTITUTION:The topmost section of an internal flame cylinder 6 is formed with a secondary flame opening section 12 which has a group of air holes the opening area of which is larger than other sections. A flame straightening section 14 that projects outwards to the side of a combustion chamber 8 is provided with a small distance above from the secondary flame opening section 12. A secondary flame ring 19 is provided at the upper end of a red hot section 15 so that the air passage 20 between the red hot section 15 and a penetrating cylinder 17 is shielded and the secondary flame ring 19 is near the secondary flame opening 12 of the internal flame cylinder 6. Air vent holes 22 that pass from the air passage 20 to the section above the secondary flame ring 19 are provided in the inclining section 21 of the secondary flame ring 19. A flame retaining section 23 projects at the upper end of the red heat section 15 internally from the red hot section 15, that is, towards the combustion chamber 8, and provided below the flame straightening section 14.

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.

2. Prior Art Conventionally, in this type of combustion apparatus, as shown in FIG.
It held the top edge of the. During steady combustion, a secondary flame mouth is formed, and combustion is promoted by secondary air H supplied from the through hole E at the upper end of the red-hot part B and the air hole G of the inner flame tube F, resulting in stable combustion. .

Problems to be Solved by the Invention However, in the above configuration, when the combustion amount is reduced to a value smaller than the rated combustion amount, the following problems occur.

(1) The through holes E of the outer flame cylinder are provided continuously;
As the combustion rate is reduced, the secondary flame gradually falls into the combustion chamber I like flame I, and a large amount of secondary air H is generated on the side of the flamework.
This hits the flame I, which is about to complete combustion in the combustion chamber, and suppresses the combustion reaction, thereby deteriorating the combustion condition and generating a large amount of -carbon oxide.

(2) The flame held in the through hole E of the red-hot part B or the flame held in the wall air hole K of the inner flame F gradually disappears from above the combustion chamber J when the combustion amount becomes small, and then it simply disappears. It becomes an air vent, and the air cools the secondary flame,
As the combustion reaction is suppressed, combustion worsens.

(3) When the combustion amount is reduced and the secondary flame falls into the combustion chamber I, the through hole E on one side of the red-hot part B becomes a mere air passage, so the red-hot part Bh is cooled and no longer red-hot, and the lower part It was extremely dark compared to the original, which was a problem in terms of appearance.

(4) In order to prevent deterioration of combustion when the combustion amount is reduced, it is necessary to suppress the combustion amount in combustion chamber 1 and prevent the flame I from dropping. To do this, the combustion chamber I must be lowered. In that case, the area of the red-hot portion B becomes smaller and less radiant heat is obtained.

Furthermore, in the conventional configuration, since the combustion gas rises almost directly upward in the combustion chamber I, the pressure balance within the combustion chamber J is easily affected by external factors, and for example, if the combustion chamber J is hit by wind, flashback may occur.

The present invention solves such conventional problems, and aims to provide a combustion device that has a wide combustion amount adjustment range, has a large area of the red-hot part to obtain a large amount of radiation, and has a good red-hot state in the red-hot part. purpose.

Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention, a secondary flame port having an air group with a larger opening area than other parts is provided at the top of the inner flame cylinder, and this A flame regulation part is formed above the secondary flame opening and projects outward with a slight interval, and a flame regulation part is formed between the transmitting cylinder and the red-hot part at the upper end of the red-hot part provided above the outer flame cylinder. A secondary flame ring is provided in the vicinity of the secondary flame port of the inner flame tube so as to shield the air passage, and this secondary flame ring is formed with an inclined part such that the inclined surface faces inward and upward. A ventilation hole leading from the air passage to the upper side of the secondary flame ring is provided in this inclined portion, and a flame stabilizing portion protruding inward from the red-hot portion is formed below the flame regulating ring at the upper end of the red-hot portion.

Effects According to the present invention, with the above-described configuration, the ventilation resistance in the combustion chamber is increased, and the flow path of the combustion gas is bent, so that the combustion gas is mixed well. Moreover, the strong flame formed in the secondary flame nozzle can be directed outward by the flame regulating section, and air can be efficiently supplied to the tip of the flame from the ventilation hole of the secondary flame ring. Furthermore, since air is removed from the vent hole, the flow of combustion gas follows the red-hot part, and a flame front can be formed on the surface of the red-hot part. Furthermore, since the vents are provided on the slope, the air from the secondary burner port and the air from the vents intersect above the combustion chamber, forming an air layer there.

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

In Figures 1 and 2, 1 is a cylindrical lamp wick, and the inner tube 2
and the core outer cylinder 3 so as to be vertically movable. The upper 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, on which are placed an inner flame tube 6 and an outer flame tube 7.

During combustion, the upper end of the lamp wick 1 is exposed within the combustion chamber θ formed between the inner flame tube 6 and the 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 approximately concentrically in order from the inside, and are integrated and fixed by two cross pins 10. Reference numeral 11 indicates a large number of air holes provided in the inner flame tube 6 and the outer flame tube 7. A secondary flame port 12 is formed at the top of the inner flame cylinder 6 and has a group of air holes having a larger opening area than other parts. Reference numeral 1a denotes an inner flame tube top plate that closes the upper end opening of the inner flame tube 6. A flame regulation part 14 is set above the secondary flame opening part 12 and projects outward, that is, toward the combustion chamber 8 side, through a small interval. It is formed by bending outward. Reference numeral 15 indicates a red-hot part provided on the upper part of the outer flame cylinder 7, and reference numeral 16 indicates a through hole provided in the red-hot part 15. Reference numeral 17 denotes a transmission cylinder made of a transparent material such as glass, which is placed on the outer cylinder 9J and extends above the red-hot part 15 and the inner flame cylinder 6. 18 is a top ring placed above the transmission tube 17. 19 is a secondary flame ring provided at the upper end of the incandescent part 16, and is set in the vicinity of the secondary flame opening part 12 of the inner flame cylinder 6 so as to shield the air passage 20 between the incandescent part 15 and the transmission tube 17. It is. This secondary flame ring 19 is formed with an inclined part 21 whose inclined surface faces inward and northward, and this inclined part 21 is provided with a ventilation hole 22 that leads from an air passage 20 to the upper part of the secondary flame ring 19. This ventilation hole 22 may be a small hole or a slit-shaped hole that is equal to the circumference. Reference numeral 23 is a flame stabilizing part that protrudes inward from the red-hot part 15, that is, toward the combustion chamber 8, at the upper end of the red-hot part 15. In this embodiment, by bending the inner end of the secondary flame ring 19 downward and further bending the end inward, the secondary flame ring 19 is set below the vent hole 22. It is integrally separated from the flame ring 19.

In this embodiment, the flame regulating section 14 and the flame stabilizing section 22 are formed of plate-shaped parts that protrude into the combustion chamber 8, but any material can be used as long as it increases the ventilation resistance of the combustion chamber 80. I can't help it. 24 is a secondary combustion chamber formed above the inner and outer flame tubes 6.7.

In the above-mentioned separation, when the lamp wick 1 is ignited, combustion starts,
The high-temperature combustion caused by combustion rises up the combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows into the inner flame tube 6,
It is supplied into the combustion chamber 8 through the air hole 11 of the outer flame tube 7 and the through hole 16 of the red-hot part 1S, and combustion continues. During normal firing, a flame Fr (solid line) is formed between the flame holding part 23 and the secondary flame port part 12 of the inner flame cylinder 6. In this case, since the flame regulating part 14 and the flame stabilizing part 23 each protrude into the combustion chamber 8, the ventilation resistance in the combustion chamber e becomes large, and the amount of air flowing into the combustion chamber 8 from the through hole 16 and the air hole 11 increases. can be suppressed. Therefore, the amount of combustion in the combustion chamber 8 can be reduced, and even when the amount of combustion is reduced, the flame F is prevented from falling into the combustion chamber 8, so that deterioration of combustion exhaust gas can be suppressed. Therefore, there is no need to lower the height of the combustion chamber 8 in order to prevent deterioration of combustion exhaust gas when the combustion amount is reduced, and it is possible to widen the red-hot section 16 and obtain large radiation. In addition, since vortices are generated near the ends of the flame regulating section 14 and the flame stabilizing section 23, the flame Fr can be firmly held, so even if the combustion amount is reduced and the flame Fs (broken line) becomes small, the combustion chamber It is possible to prevent a drop to within 8. Therefore, it is possible to widen the adjustment range of the combustion amount. Furthermore, since the secondary flame port part 12 has a larger opening area than other parts, a large amount of air is supplied to the upper part of the combustion chamber 8, and the flame regulating part 14 and the flame stabilizing part 23 (indicated by the solid line arrow) As the flow path of the combustion gases is bent, mixing is improved and a strong, uniform flame can be formed. During normal combustion, the area around the secondary flame formed in the secondary flame port 12 is in an atmosphere containing unburned gas, and air is efficiently supplied there from the vent hole 21 as shown by the broken line arrow, so that the combustion reaction takes place. is promoted, which is more effective in making the flame uniform.

The flame stabilizing part 23 is set below the ventilation hole 22, and the flame regulating part 1
4, the flow of combustion gas is eventually spread outward by the flame regulating section 14, which prevents the flames from gathering and becoming a large flame, and also allows the combustion gas to be located directly above the ventilation hole 22. Since the flame is formed through the air vent hole 21, air can be efficiently supplied to the flame, which is effective in making the flame uniform.

In terms of design, the flame stabilizing part 23 can be set at one position of the ventilation hole 22, but in this case, the distance between the flame regulating part 14 and the flame stabilizing part 23 becomes small, and the ventilation resistance becomes too large, which prevents combustion. As the condition deteriorates, the distance between the flame vent and the vent 22 also increases, and the effect of flame uniformity also decreases.

Therefore, it is desirable that the flame stabilizing section be set below the ventilation hole 22.

In addition, since air is vented upward from the secondary flame ring 19 from the vent hole 22, the flow of combustion gas rising in the combustion chamber 8 can be directed toward the red-hot part 15, so that the high temperature reaches the upper end of the red-hot part 15. The red-hot state of the red-hot part 15 can be maintained uniformly and well, and the temperature of the flame-holding part 22 also increases to promote combustion, so the flame-holding power in the flame-holding part 22 is strengthened and the flame is can prevent the decline of In addition, the ventilation hole 22 is provided in the inclined part 22 with the slope facing inward and upward, so that the air flow is supplied from the secondary flame port 12 as shown by the dashed-dotted line arrow, and the air is supplied from the ventilation hole as shown by the broken line arrow. Since the air flow intersects above the combustion chamber 8 and forms an air layer here, the pressure balance within the combustion chamber 8 is less likely to be affected by external factors, and for example, even when the wind hits it, backfire etc. It has great effects in terms of safety as well.

Further, in this embodiment, the transmission tube 17 is extended above the inner and outer flame tubes 6.7 to form the secondary combustion chamber 24 above the combustion chamber 8. With this configuration, the flame Fr is Since it is not cooled to the outside and the flow of combustion gas is not disturbed, it is even more effective in improving combustion characteristics.

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

(1) Since the flame regulating part and the flame stabilizing part protrude into the combustion chamber, the ventilation resistance inside the combustion chamber increases, and the amount of air flowing into the combustion chamber is suppressed, so it is possible to reduce the amount of combustion inside the combustion chamber. can. Therefore, even when the combustion amount is reduced, the flame can be prevented from falling into the combustion chamber. In addition, vortices are formed near the ends of the flame stabilizing section and the flame regulating section, which firmly holds the flame, which is further effective in preventing the flame from falling into the combustion chamber. Therefore, deterioration of the combustion exhaust gas can be prevented, and the combustion amount can be adjusted over a wide range. Furthermore, since the combustion exhaust gas is less likely to deteriorate, the height of the combustion chamber can be made relatively high, and the red-hot part can be made high to obtain large radiation.

(2) The flow path of the combustion gas rising inside the combustion chamber is bent by the flame holding plate and the flame regulating plate, which improves the mixing of the combustion gas and supplies a large amount of air to the upper part of the combustion chamber from the secondary flame opening. Because of this, it is possible to form a uniform and strong flame.

(3) The flame stabilizing section is set at a position below the flame regulating section, and the flow of combustion gas is eventually spread outward, so that it is possible to avoid the flames gathering and forming a large flame.

(a) Air can be efficiently supplied from the ventilation holes of the secondary flame ring to the flame tip, which is in an atmosphere where unburned gas exists, which promotes combustion and is more effective in making the flame uniform.

(5) Since air is removed from the ventilation holes, the flow of combustion gas rising up the combustion chamber moves toward the red-hot area, forming a flame front here, so the temperature can be maintained up to the top of the red-hot area.
In addition to keeping the red-hot state even and good throughout, the flame-holding area is also kept at a high temperature, which promotes combustion and strengthens the flame-holding ability.It also prevents the flame from collapsing, improving combustion characteristics. effective.

(6) Since the ventilation hole is provided on the slope, the airflow from the ventilation hole and the airflow from the secondary flame port intersect above the combustion chamber.
Since a layer of air is formed here, the pressure balance within the combustion chamber is less affected by external factors such as wind, and flashback and the like occur, thereby increasing safety.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention, FIG. 2 is an enlarged sectional view of the main part, and FIG. 3 is an enlarged sectional view of a main part of a conventional combustion apparatus. 6... Inner flame tube, 7... Outer flame tube, 9...
...Outer tube, 12...Secondary flame opening, 14...
...Flame regulating part, 15... Red-hot part, 17...
...Transmission tube, 19...Secondary flame ring, 20.
... Air path, 21 ... Inclined part, 22 ...
...Vent hole, 23...Flame holding part. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3

Claims (2)

[Claims] (1) An inner flame tube, an outer flame tube, and an outer tube each having a plurality of air holes are arranged approximately concentrically from the inside, and a transparent tube made of glass or the like is placed above the outer tube to form a combustion tube. A secondary flame port having a group of air holes with a larger opening area than the other parts is provided at the upper part of the inner flame tube, and a secondary flame port is provided above the secondary flame port with a slight gap to the outside. At the same time as forming a flame regulating part protruding from the outer flame cylinder, the inner flame cylinder is provided at the upper end of the red-hot part provided above the outer flame cylinder so as to block the air passage formed between the transmitting cylinder and the red-hot part. A secondary flame ring is provided near the secondary flame opening,
This secondary flame ring is formed with an inclined part such that the inclined surface faces inward and upward, and this inclined part is provided with a ventilation hole leading from the air passage to the upper part of the secondary flame ring. A combustion device in which a flame stabilizing part that protrudes further inward is provided below the flame regulating ring. (2) The combustion device according to claim 1, wherein the flame holding part is set at a position below the ventilation hole.