JPH076611B2 - 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 to vaporize and burn the combustion. It has become. Further, 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 flame cylinder 55, and the combustion vaporized from the wick 54 and the combustion chamber from the through hole 56a. The air introduced into 53 was mixed and burned, and the red heat section 56 was red-heated to obtain radiant heat.

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 flow of air and the broken arrow indicates the flow of unburned gas. As is clear from this drawing, in the conventional combustion device, unburned gas leaks to the inside of the inner flame cylinder 51, 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 points, and is intended to reduce the amount of CO when the combustion amount is reduced to widen the combustion amount adjustment range and to improve the assemblability. is there.

Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention, the inside of the inner flame cylinder extends from the vicinity of the position facing the wick to the vicinity of the upper end of the inner flame cylinder, A flow control cylinder having a first collar portion that substantially shields the flow control area formed between the flame control tube and the bottom surface is provided, and the flow control tube divides the flow control area into a plurality of second flow control areas. The collar is provided and the outer diameter of the second collar is smaller than the outer diameter of the first collar.

Operation The present invention introduces the unburned gas leaking inward into the inner flame cylinder into each restricted zone by the above-mentioned configuration, and concentrates this gas while mixing with the clean air supplied above each restricted zone. It is supplied to the combustion chamber to promote combustion, and the inside of the upper end of the inner flame cylinder is kept in a clean state with a small amount of unburned gas components, and the combustion amount adjustment range can be widened. Further, since each collar portion dividing the above-mentioned flow control region into a plurality has a diameter smaller than this except for the lowermost collar portion, even if the flow control cylinder has a plurality of collar portions, it does not reach the inner flame cylinder. Can be easily incorporated.

Embodiment An embodiment of the present invention will be described below with reference to FIG. 1. Reference numeral 1 denotes a wick, which is set between an inner core tube 2 and an outer core tube 3 so as to be vertically movable. The upper ends of the inner core tube 2 and the outer core tube 3 respectively form an inner fire tray 4 and an outer fire tray 5, on which an inner flame barrel 6 and an outer flame barrel 7 are placed. At the time of combustion, the tip of the wick 1 is exposed inside a combustion chamber 8 formed between the inner flame cylinder 6 and the outer flame cylinder 7, where the fuel is vaporized. 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 in a substantially concentric manner from the inside, and are fixed pins.
It is integrated by 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 a vent hole 13 that communicates upward from the inside of the inner-flame cylinder 6. Reference numeral 14 is a flame spreading plate placed on the inner flame cylinder top plate 12. The upper end of the outer cylinder 9 has a throttle portion 15
Further, a red-heated 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. 18 is a transparent tube made of a transparent material such as glass,
It is placed on the outer cylinder 9. Reference numeral 19 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 20 between the red heat section 16 and the transmission tube 18, and fixes the transmission tube 18. Reference numeral 21 is a flow restricting cylinder installed inside the inner flame cylinder 6 and extends upward from the vicinity of the position facing the tip of the wick 1 to near the end of the inner flame cylinder 6 and is formed between the inner flame cylinder 6 and the inner flame cylinder 6. A first brim portion 21a that substantially shields the basin 22 at its bottom surface is provided by beading, framing, or the like. Further, the flow control cylinder 21 is provided with second flange portions 21b, 21b for dividing the flow control region 22 into a plurality of portions at at least one place by beading processing, flare processing or the like as in the above, and this second flange portion 21b. , 21b have an outer diameter smaller than that of the first collar portion 21a. In addition, a vent hole 21c is provided in the lower portion near the second collar portions 21b, 21b. Reference numeral 23 is an air introduction passage formed in the flow restricting cylinder 21, 24 is a combustion control cylinder, which is set at the upper inside of the outer flame cylinder pore portion 25, and the upper end is near the position facing the throttle portion 15 of the outer cylinder 9. An air chamber 26 is formed between the air chamber 26 and the pores 25. Reference numeral 27 denotes a communication hole provided on the wall surface of the combustion control cylinder 24, which serves as an air chamber 26 and a combustion chamber 8.
A large number are evenly provided so as to communicate with each other.

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 supplied from the inner side of the inner flame cylinder 6 is divided into the air supplied from below the control cylinder 21 to the vicinity of the wick 1 and the flow of air rising in the air introduction passage 23. A part of the rising air passes through the air holes 21c and is supplied to the combustion chamber 8 through each of the restriction regions 21. Further, the air supplied above the inner flame cylinder 6 has air holes 11 and ventilation holes 13
Is supplied to the combustion chamber 8 and above it. Further, a part of the air flows into the upper control region 22a and is also supplied to the combustion chamber 8 from the air holes 11 located relatively below. On the other hand, the vaporized fuel becomes a mixed gas with air and mainly rises in the combustion chamber 8. However, since each of the restriction regions 22 and 22a has a negative pressure, a part of the mixed gas leaks into each of the restriction regions 22 and 22a. However, this unburned gas does not pass through the communication hole 21 and the ventilation part above the flow control cylinder 21.
It is mixed with the air flow flowing from 28 into the restricted region and supplied again to the combustion chamber. Therefore, during strong combustion, unburned gas and air are supplied to the vicinity of the upper end of the combustion chamber 8 from the vicinity of the upper end of the inner flame cylinder 6 in a well-mixed state, so that they are efficiently combusted in the vicinity of the region A and cannot be completely burned there. The combustion gas is burned by the flame formed above. Next, when the exposed height of the wick 1 is decreased to reduce the combustion amount, the flame gradually descends into the combustion chamber 8. The flow in this case is also similar to that in the strong combustion, but the amount of vaporized gas is greatly reduced, so the amount of unburned gas flowing into the upper control region 22a is reduced. Therefore, the vicinity of the area B becomes a good mixing area, flame holding is formed in this area, the wall surface of the inner flame tube 6 is red-heated, and combustion is completed by the flame formed above the wall. In this case, upper control basin
Most of the unburned gas flowing into the 22a is supplied into the combustion chamber 8 and burned by the flame. Therefore, there is almost no unburned gas component in the upper control region 22a located above the flame, and the air above the flame exists. The air discharged from the holes 11 and the ventilation holes 13 is clean, and the exhaust gas characteristics (CO / CO ₂ ) do not deteriorate. Therefore, the combustion amount can be narrowed down to a considerably low position, and the combustion adjustment range becomes wide.

On the other hand, the flow control cylinder 21 of this combustion device includes the first and second collar portions 21a, 2
Since it has a plurality of flanges 1b and 21b, and these flanges 21a and 21b are substantially equal to the inner flame cylinder diameter, the flow restricting cylinder 21 is incorporated in the inner flame cylinder 6. Tends to be difficult. However, the collar portions 21a, 21a of the flow control cylinder 21 are
The diameters of b and 21b are smaller than that of the collar portion 21a except for the lowermost collar portion 21a, so that they can be smoothly incorporated into the inner flame cylinder 6.

Since the combustion device described in the above embodiment is provided with the combustion control cylinder 24 on the side of the outer flame cylinder, there is an advantage that the exhaust gas characteristics are further improved. That is, the air from the outside is divided into the air from the air hole 11 of the outer flame cylinder 7 and the air from the through hole 17 of the red heat part 16 by the throttle portion 15 at the upper end of the outer cylinder 9 and supplied into the combustion chamber 8, respectively. At this time, flame holding is formed in the air hole 11 of the outer flame cylinder 7 and the through hole 17 of the red heat section 16, but a part of the unburned gas in the combustion chamber 8 at the portion facing the throttle section 15 is an inner flame. Although not as much as on the cylinder side, the phenomenon of leakage into the air passage 20 occurred, and part of it leaked to the red heat part 16
As it is discharged from the upper part of the through hole 17 of
Makes CO / CO ₂ worse. In order to reduce this, the above-mentioned combustion control cylinder 24 is provided, and the unburned gas is locally burned in the air chamber 26 by the air from the outer flame cylinder vaporizer 25 to leak the unburned gas. And the unburned gas leaked is black arrow C
As shown in (3), the draft in the combustion chamber is drawn into the combustion chamber 8 so that the combustion is performed, and the flow of air along the outer flame cylinder 7 is caused to reduce the deterioration of CO / CO ₂ by half. Therefore, the combustion amount can be narrowed down to a lower place, and the combustion adjustment range becomes wide.

Further, even at the time of ignition, air is efficiently supplied to the lower side of the combustion chamber 8 from the communication hole 27 and the ventilation hole 21c, so that rapid combustion is promoted and the generation of CO and odor is small. Also, the same effect can be obtained when the material is burned for a long time in a well-sealed room. That is, in the oxygen-deficient state, the amount of combustion decreases with the decrease in oxygen concentration, and a phenomenon similar to that in the case where the exposed height of the wick 1 is decreased to decrease the amount of combustion is observed. Since air is supplied to the combustion chamber 8 through the vent hole 21c, combustion is promoted there and the oxygen deficiency characteristic is improved.

EFFECTS OF THE INVENTION As is apparent from the description of the embodiments above, according to the combustion apparatus of the present invention, the control range of the combustion amount is widened by providing the flow restricting cylinder, and the flow restricting cylinder has a plurality of collar portions. However, there is an advantage that it can be easily incorporated in the inner flame tube and productivity is improved.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential part of a combustion apparatus according to an embodiment of the present invention, and FIG. 2 is a sectional view of an essential part 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, 18 ... transmission cylinder, 21 ...
Restriction cylinder, 21a ...... first flange part, 21b ... second flange part, 22 ... restricted area, 28 ... vent hole.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Katsuhiko Ishikawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd. (72) Inventor, Katsuhiko Uno 1006 Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. 56) References JP-A 64-67507 (JP, A) JP-A 63-201413 (JP, A) JP-A 62-108909 (JP, A)

Claims (1)

[Claims] 1. An outer flame cylinder comprising a pore part having a large number of air holes and a red heat part formed above the pore part, and an inner flame cylinder having a large number of air holes arranged inside the outer flame cylinder. An outer cylinder positioned outside the outer flame cylinder, a permeation cylinder mounted above the outer cylinder, and a combustion chamber lower end formed between the outer flame cylinder and the inner flame cylinder so as to be vertically movable. And a wick, which extends inside the inner flame tube from near the position facing the wick to near the upper end of the inner flame tube, and substantially shields the restricted region formed between the inner flame tube and the inner flame tube by the bottom surface. A flow control cylinder having a first flange is provided, the flow control cylinder is provided with at least one or more second flanges that divide the flow restriction region into a plurality, and the outer diameter of the second flange is the first flange. A combustion device that is smaller than the outer diameter of the section.