JPH0754164B2 - Combustion device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for household heating or the like.

2. Description of the Related Art Conventionally, as this type of combustion apparatus, there is a suction vaporization type combustion apparatus used in oil stoves and the like. As shown in FIG. 2, the tip of the wick 54, which is a combustion supply unit, is exposed in the combustion chamber 53 between the inner flame cylinder 51 having a large number of air holes and the outer flame cylinder 52 so that the fuel is vaporized and burned. It has become. The normal outer flame cylinder 52 forms a red heat portion 56 having a through hole 56a having a large opening area above the narrowed portion 55a of the outer cylinder 55, and the fuel vaporized from the wick 54 and the combustion chamber 53 from the through hole 56a. The radiant heat was obtained by mixing the air introduced into the interior and burning it to make the red heat section 56 red hot.

Problems to be Solved by the Invention However, the above-described conventional configuration has the following problems. That is, in FIG. 2, the solid arrow indicates the air flow, and the broken arrow indicates the unburned gas flow. As is clear from this drawing, in the conventional combustion device, unburned gas leaks to the outside of the outer flame cylinder 56, and when this reduces the combustion amount, it flows upward as it is and the Co amount increases. Therefore, the combustion amount adjustment range could not be widened.

The present invention has been made in view of the above circumstances, and it is possible to reduce the amount of Co when the combustion amount is reduced to widen the combustion amount adjustment range, and to provide a safe, inexpensive, and comfortable combustion device. It is intended.

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention has inner and outer flame cylinders that are integrally formed, respectively, and divides the permeation cylinder into upper and lower parts, and further The inner diameter is made larger than the inner diameter on the lower side, and the connecting part of the upper and lower permeation tubes is located near the flame tip at the time of low combustion. A control ring for returning gas into the combustion chamber is provided.

Effect With the above-described configuration, the present invention prevents unburned gas leaking outside the outer flame cylinder by the control ring into the combustion chamber and re-combusts it, thereby preventing deterioration of exhaust gas characteristics (Co / CO ₂ ).

Embodiment An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a wick, which is set between a core inner cylinder 2 and a 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 fire tray 4 and an outer fire tray 5, respectively.
An inner flame cylinder 6 and an outer flame cylinder 7 are placed as one piece. Wick 1
At the time of combustion, the tip of is exposed in the combustion chamber 8 formed between the inner flame cylinder 6 and the outer flame cylinder 7, and the vaporization of combustion is performed here.
Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, the outer flame cylinder 7, and the outer cylinder 9 are sequentially arranged from the inside in a substantially concentric manner and are integrated by a fixing pin 10. Reference numeral 11 denotes air holes provided in the inner flame cylinder 6 and the outer flame cylinder 7. Reference numeral 12 denotes an inner-flame cylinder top plate that closes the upper end opening of the inner-flame cylinder 6 and has an opening 13 that communicates from the inside of the inner-flame cylinder 6 to the upper side. Reference numeral 14 is a flame spreading plate placed on the inner flame cylinder top plate 12. A throttle portion 15 is formed at the upper end of the outer cylinder 9, a red heat portion 16 is formed in the outer flame cylinder 7 above the throttle portion 15, and a through hole 17 having a large opening is provided. 18a is the lower transmission tube, 1
8b is an upper transmission cylinder, which is made of a transparent material such as glass. Reference numeral 19 denotes a control ring, which connects and fixes the lower permeable cylinder 18a and the upper permeable cylinder 18b, is located near the flame tip at the time of low combustion, and protrudes toward the outer flame cylinder 7 side to prevent leakage from the lower part of the outer flame cylinder. The fuel gas is returned to the combustion chamber.
Reference numeral 20 denotes a top frame, which is placed on the upper end of the red heat section 16 so as to shield the upper end of the air passage 21 between the red heat section 16 and the upper transmission tube 18b, and fixes the upper transmission tube 18b.

In the above structure, when the wick 1 is ignited, combustion starts, and a high temperature combustion gas generated by combustion rises in the combustion chamber 8 to generate a thermal draft, and the air required for combustion is the air holes of the inner flame cylinder 6 and the outer flame cylinder 7. 11 and the through holes 17 of the red heat section 16 are supplied into the combustion chamber 8 to continue combustion.

At this time, the air from the outside is divided into air from the pores 11 of the outer flame cylinder 7 and the through holes 17 of the red heat part 16 by the throttle portion 15 at the upper end of the outer cylinder 9 and is supplied into the combustion chamber 8. External flame cylinder 7 at this time
The flame holes are formed in the air holes 11 and the through holes 17 of the red heat portion 16, but a phenomenon occurs in which a part of the unburned gas in the combustion chamber 8 leaks to the air passage 21 at the portion facing the throttle portion 15. Then, a part of them is discharged as it is from the upper part of the through hole 17 of the red heat section 16, so that Co / CO ₂ is deteriorated at the time of low combustion. The control ring 19 is provided in order to reduce this, and the unburned gas leaked to the air passage 21 is the combustion chamber 8 as shown by a black arrow A.
It returns to the inside and reburns to reduce the deterioration of Co / CO ₂ in half. Therefore, the combustion amount can be narrowed down to a low place, and the combustion adjustment range becomes wide. At this time, a large amount of air B enters from the projecting portion of the control ring 19, the flame of the combustion chamber shifts inward, and local combustion is likely to occur at the flame surface C to cause a yellow fire. However, if the inner diameter of the upper transmission tube 18b is set to the lower transmission tube 1
Since it is made larger than the inner diameter of 8a, the space between the upper permeation tube 18b and the outer flame tube 7 becomes a negative pressure, and the flame surface C of the combustion chamber.
Becomes closer to the outside, the amount of air decreases, and yellow fire is less likely to occur. Therefore, stable combustion can be performed without the occurrence of yellow fire.

It should be noted that the same effect can be obtained if the inner diameter of the transmission tube itself can be made small and the inner diameter of the transmission tube can be made large to make precise integral molding.

EFFECTS OF THE INVENTION As described above, according to the combustion apparatus of the present invention, the exhaust gas characteristics (Co / Co ₂ ) can be improved in a high combustion range, and the range of adjustment of the combustion amount is widened. Since there is no yellow fire, it is not necessary to divide the inner and outer flame cylinders and move them up and down structurally, and the inner and outer flame cylinders can be integrated, so it is simple and inexpensive. It is possible to obtain a practically comfortable combustion device at low cost.

[Brief description of drawings]

FIG. 1 is a sectional view of a combustion apparatus showing an embodiment of the present invention, and FIG. 2 is a sectional view of a combustion apparatus showing a conventional example. 1 ... wick, 6 ... inner flame cylinder, 7 ... outer flame cylinder, 8 ... combustion chamber, 9 ... outer cylinder, 11 ... air hole, 16 ... outer flame cylinder red heat part,
18a …… Lower transmission tube, 18b …… Upper transmission tube, 19 …… Control ring.

Claims (1)

[Claims] 1. An outer flame cylinder comprising a pore portion having a large number of air holes and a red heat portion formed above it, and an inner flame cylinder having a large number of air holes arranged in the outer flame cylinder, An outer cylinder positioned outside the outer flame cylinder, a transmission cylinder placed above the outer cylinder, and a combustion chamber lower end formed between the outer flame cylinder and the inner flame cylinder are set to be vertically movable. And a wick, and the inner and outer flame cylinders are respectively integrated, the transmission cylinder is divided into upper and lower, and the inner diameter of the upper side of the transmission cylinder is larger than the inner diameter of the lower side, The connecting portion of the upper and lower permeable cylinders is near the flame tip at the time of low combustion. Combustion device.