JP2543097B2 - 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. 3, the tip of the wick 54, which is the fuel supply unit, is exposed to the combustion space 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 heating portion 56 having a through hole 56a having a large opening area above the throttle 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. 3, the solid line arrow shows the flow of air, and the broken line arrow shows 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 out upward as it is and the CO amount increases, which is why It was not possible to widen the range of adjusting the combustion amount.

The present invention has been made in view of such a point, and reduces the CO amount when the combustion amount is reduced to widen the combustion amount adjustment range, and when the combustion amount is reduced, the outer flame cylinder, The purpose of this is to prevent the occurrence of red heat unevenness in the flame tube and to prevent abnormal standing flames from occurring even when a rapid change from low combustion to high combustion is performed.

Means for Solving the Problems In order to solve the above problems, in the combustion apparatus of the present invention, a control region is formed inside the inner flame cylinder and between the inner flame cylinder and the lower end thereof faces the wick. Located above the position, the upper end suppresses the flow of unburned gas that has flowed out of the combustion chamber into the restricted region from above the flame when the combustion is throttled, and again introduces the flow into the combustion chamber for combustion. A flow restricting cylinder extending to a position where it occurs, and a first overhanging part in the horizontal direction on the bottom surface of the flow restricting cylinder in order to suppress the flow in the flow restricting area between the flow restricting cylinder and the inner flame cylinder. 1 suppressor, and at least one or more vent holes are provided on the wall surface of the restrictor cylinder above the first suppressor of the restrictor cylinder. Providing at least one second suppressing portion that projects toward the flame tube side, the second suppressing portion is provided. The uppermost restraint portion of the restraint portion is arranged above the outer cylinder and below the center portion of the red heat portion.

Effect The present invention has the above-described configuration and introduces unburned gas into the restricted flow region formed between the inner flame cylinder and the restricted flow cylinder, and the unburned gas is supplied by the clean air supplied above the restricted flow cylinder. While mixing, it is intensively supplied to the combustion chamber from the inner flame cylinder air hole near the upper end of the flow control cylinder to promote combustion. Further, since the control flow area is provided in a plurality of stages, the combustion gas flowing into the control flow area above the flame becomes a gas in which combustion has progressed considerably, and a large amount of CO can be prevented from being generated. At this time, the uppermost suppressing part of the suppressing parts that suppress the flow in the restricting region between the restricting cylinder and the inner flame cylinder is located above the outer cylinder and from the central part of the red heat part of the outer flame cylinder. Since it is provided below and at a position that substantially coincides with the flame position generated in the combustion chamber in the minimum combustion state, it is possible to prevent uneven red heat caused by air flowing into the inner flame cylinder from outside the flame region. In addition, since the control region above the uppermost restraint does not become so long, the combustion gas flowing to the control region does not increase too much, and therefore the brightness of the outer flame tube that tends to occur does not decrease. Further, even for excessive standing flames generated when the minimum combustion state is changed to the maximum combustion state all at once, the uppermost suppressing portion and the vent hole therebelow are below the position where combustion is promoted, A large amount of air is difficult to flow, and on the contrary, sufficient air can be supplied to an excessive standing flame, so that an excessive standing flame can be suppressed.

Embodiment One embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 shows the maximum combustion state, and FIG. 2 shows the minimum combustion state. In the figure, reference numeral 1 denotes a wick, which is vertically movable between an inner core cylinder 2 and an outer core cylinder 3. Inner core 2 and outer core 3
The upper end portions of the two forms an inner flame tray 4 and an outer flame tray 5, respectively, on which an inner flame cylinder 6 and an outer flame cylinder 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 combustion 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 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 on the upper end of the outer cylinder 9, and a red heat portion 16 is formed on the outer flame cylinder 7 above the throttle portion 15,
A through hole 17 having a large opening is provided. A transparent cylinder 18 made of a transparent material such as glass 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, forming a restriction flow region 22 between the inner flame cylinder 6 and the inner flame cylinder 6, and the lower end is located above the vicinity of the position facing the tip of the wick 1, The upper end prevents unburned gas that has flowed out of the combustion chamber 8 into the restricted region 22 from flowing in from above the flame when the combustion is throttled, and is introduced into the combustion chamber 8 again to a position where a flow for combustion is generated. It has been extended. Further, the flow restricting cylinder 21 is provided with a first suppressing portion 21a which suppresses the flow of the flow restricting zone 22 formed between the inner flame cylinder 6 and the inner flame cylinder 6 by beading processing or flare processing. Further, in the flow control cylinder 21, the flow control region 22 is divided into a plurality of parts at least at one or more places, and the second control portion 21b for suppressing the flow of the flow control region 22 and the uppermost part having the same effect as the second control portion are provided. The suppressing section 21c of the outer cylinder 9 is provided with the suppressing section 21c of the outer cylinder 9 by beading processing, flare processing or the like as described above.
Is provided above and below the central portion of the red heat portion 16 of the outer flame tube 7. Reference numeral 23 is an air introduction passage formed in the flow control 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 close to a 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.
27 is a communication hole provided in the wall surface of the combustion control cylinder 24, which
And a plurality of combustion chambers 8 communicate with each other. Ventilation holes 28b and 28c are formed on the wall surface of the flow control cylinder 21, and are provided directly below the second suppressing portion 21b and the uppermost suppressing portion 21c.

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 hole 17 of the red heat section 16 through the combustion chamber 8
It is supplied inside and combustion is continued. At this time, the air supplied from the inner side of the inner flame cylinder 6 is the air supplied from below the flow restricting cylinder 21 to the vicinity of the wick 1 and the flow of air rising in the air introduction passage 23.
It is divided into 23a. Some of the rising air is vented through the vents 28b,
After passing through 28c, it is supplied to the combustion chamber 8. Furthermore, the internal flame cylinder 6
The air supplied upward is supplied from the air hole 11 and the opening 13 to the combustion chamber 8 and above the combustion chamber 8. Further, part of the air flows into the upper control region 30 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 the lower control region 29 and the upper control region 30 have a negative pressure, a part of the mixed gas leaks into the lower control region 29 and the upper control region 30. However, this unburned gas is mixed with the air flow coming from the ventilation holes 28b, 28c and the ventilation portion 31, and is 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 the combustion cannot be completed here. Combustion gas is a flame formed above fr
Burned in.

Next, FIG. 2 shows that the exposed height of the wick 1 is lowered to the minimum combustion state. In this case, as the combustion amount is reduced, the flame gradually descends in the combustion chamber 8. Then, in the minimum combustion state, as shown in FIG. 2, the flame fm is formed near the uppermost restraining portion 21c of the flow control cylinder 21. The temperature in the vicinity of the flame fm is also high, and sufficient air is supplied by the air flow 32 flowing from the ventilation hole 28c below the uppermost suppressing portion 21c, so that combustion is promoted in the vicinity of the region B. In this case, although the exhaust gas flows into the upper control region 30, this exhaust gas component is in a state where combustion has progressed considerably at fm, and the CO ratio in the exhaust gas component is not so high. Therefore, the air discharged from the air hole 11 and the opening 13 above the flame is clean,
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.

At this time, the uppermost suppressing portion 21c is provided above the throttle portion 15 of the outer cylinder 9 and below the central portion of the red heat portion 16 of the outer flame cylinder 7 and below the flame fm in the minimum combustion state. Therefore, even if combustion is promoted in the region B by the air flow 32 flowing in from the ventilation hole 28c and the air hole 11 of the inner flame cylinder 6 retains flame and becomes red hot, it is hidden in the flame fm. Will be done. For example, assuming that the uppermost suppressing portion 21c is set slightly higher, that is, higher than the flame fm in the minimum combustion state,
Even in that portion, combustion is performed with a slight amount of unburned gas, so that the inner flame cylinder 6 becomes red hot, and the red flame portion of the outer flame cylinder 7 is heated.
16 When viewed from the outside through the transmission tube 18, it seems that the inner flame tube 6 has red heat unevenness, which is very unattractive. On the contrary, if the uppermost restraint portion 21c is lowered a little, the flow restricting cylinder 21 portion above the uppermost restraint portion 21c becomes too long, and the flow of unburned gas from the combustion chamber 8 to the upper restraint area 30 is reduced. Since the flow rate of the unburned gas generated in the combustion chamber 8 is closer to the inner flame cylinder, the red heat brightness of the outer flame cylinder 7 becomes worse.

Further, in the state where the exposed height of the wick 1 is lowered, the temperature of the inner fire tray 4 and the outer fire tray 5 rises because the flame descends into the combustion chamber 8, and the temperature rapidly increases from that state. When the exposure height of the wick is increased, the vaporization amount of the wick 1 increases rapidly,
Excessive standing flame will occur above the combustion device. At that time, it is necessary to suppress an excessive standing flame by the air flowing out from the opening portion 13 of the inner flame tube top plate 12. At this time, the flow control cylinder 21
Since the air flow 32 is generated from the ventilation hole 28c below the uppermost suppressing portion 21c of the air flow 23a in the air introduction path 23,
The amount of air that partially flows into the opening 13 and flows out from the opening 13 is slightly reduced.

When the uppermost restraining portion 21c is provided above, the air flow 32 is supplied to the region where combustion is promoted, so a large amount is sent in, and the amount of air flowing in from the opening 13 is considerably reduced. , It becomes difficult to suppress excessive standing flame. On the other hand, when the uppermost suppressing portion 21c is located slightly below, the combustion is not promoted so much, so that the air flow 32 is not sent in much and the air amount is not reduced so much. Therefore, the amount of air flowing in from the opening 13 is sufficient, and an excessive standing flame can be suppressed.

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 tube 7 and the air from the overhole 17 of the red heat section 16 by the throttle portion 15 at the upper end of the outer tube 9 and is supplied into the combustion chamber 8.
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, a phenomenon occurs where air leaks into the air passage 20, some of which is the red heat part.
Since it is directly discharged from the upper part of the 16 through holes 17, CO / CO ₂ is deteriorated during low combustion. In order to reduce this, the above-mentioned combustion control cylinder 24 is provided to locally burn unburned gas in the air chamber 26 by the air from the outer flame cylinder vaporizer 25 to reduce the amount of leakage of unburned gas. Black arrow C indicates the amount of unburned gas leaked
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.

In addition, the communication hole 27 and the vent holes 28b and 28c are also ignited.
Since the air is efficiently supplied to the lower side of the combustion chamber 8 from the above, the combustion is promptly 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 ventilation holes 28b and 28c, combustion is promoted there and the oxygen deficiency characteristic is also improved.

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 adjustment range of the combustion amount is widened. It is possible to prevent red heat unevenness in the inner and outer flame cylinders, which is likely to occur in the minimum combustion state, and to prevent abnormal standing flames even if the minimum combustion is switched to the maximum combustion rapidly, making combustion practically comfortable. The device can be obtained.

[Brief description of drawings]

FIG. 1 is a sectional view of a combustion apparatus according to an embodiment of the present invention, showing a maximum combustion state. FIG. 2 is a sectional view of the same,
The minimum combustion state is shown. FIG. 3 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 ... red heat part, 18 ...
Transmission cylinder, 21 ... Restriction cylinder, 21a ... First suppression part, 21b ... Second suppression part, 21c ... Uppermost suppression part, 22 ... Restriction region, 28
b, 28c ... Vents.

 ─────────────────────────────────────────────────── ─── 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 63-223408 (JP, A) JP 63-201413 (JP, A) JP 63-49606 (JP, A) JP 62-108909 (JP, A)

Claims (1)

(57) [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 transmission cylinder mounted above the outer cylinder, and a vertically movable set at a lower end of a combustion chamber formed between the outer flame cylinder and the inner flame cylinder. And the inner flame tube is provided inside the inner flame tube to form a restricted flow region, the lower end is located above the position facing the light core, and the upper end is located above the combustion chamber. Unburnt gas that has flowed out to the restricted flow region is suppressed from flowing out from above the flame when the combustion is throttled, and it is introduced again into the combustion chamber and a restricted flow pipe is extended to a position where a flow for combustion is generated. A first suppressing portion provided on a bottom surface of the flow control cylinder so as to suppress the flow in the flow control area between the flow control cylinder and the inner flame cylinder. Ventilation holes are provided at least at one or more places on the wall surface of the flow control cylinder above the first suppressing portion of the cylinder, and at least one portion protruding from the flow control cylinder toward the inner flame cylinder side is provided immediately above the air vent hole. A combustion device in which a plurality of second suppressing portions are provided, and the uppermost suppressing portion of the second suppressing portions is located above the outer cylinder and below the central portion of the red heat portion.