JPS633104A - Combustion equipment - Google Patents

Abstract

PURPOSE:To obtain safeguarded combustion equipment of which combustion efficiency is high, and of which controlled range of combustion is wide, by introducing unburnt gas into restriction zones, and by concentrically feeding the unburnt gas into a chamber from an air passage, mixing the gas with fresh air supplied to the air passage in the upper part of a restriction cylinder. CONSTITUTION:The air supplied from the inside of an inner flame cylinder 6 is divided into an air shown by a white arrow 'a' supplied to the neighborhood of a wick 1 from the under side of a restriction cylinder A21, and an air shown by as white arrow 'b' going up through an air passage 27. An evaporated fuel is mixed with the flowing air shown by the white arrow 'a', becoming a mixed gas, and most of the gas goes up along a combustion chamber 8 as shown by a black arrow 'f'. But part of the gas flows into the restriction zones A22 and B24 as shown by black arrows 'g' and 'h' because the restriction zones A22 and B24 are vacuumized by the flowing airs shown by white arrows 'c', 'd', and 'e'. Then the restriction A22 and B24 are filled with unburnt gas. The unburnt gas is mixed with the flowing airs 'c', 'd', and 'e' in air passage A25 and B26, and is fed again into the combustion chamber 8 as shown by black arrows 'i' and 'j'. With such an arrangement, exhaust gas is prevented from being suddenly thick at the time of low combustion or in the asbsence of oxygen.

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. Description of the Related Art Conventionally, as this type of combustion device, there is a suction vaporization type combustion device used in kerosene stoves and the like. As shown in Fig. 6, the tip of the wick 1 is exposed to a combustion chamber 8 formed by an inner flame tube e and an outer flame tube 7, each having a large number of air holes, to vaporize and burn the fuel. . Normally, the outer flame cylinder 7 forms a red-hot part with an opening surface and a large through hole 1, above the throttle part 15 of the outer cylinder 9, and the fuel vaporized from the lamp wick 1 and the through hole 17 are connected to each other. The air introduced into the combustion chamber 8 was mixed and combusted, causing the red-hot section 16 to become red-hot to obtain radiant heat.

Problems to be Solved by the Invention However, the above configuration has caused the following problems.

In normal strong combustion, as shown in Figure 5, the inner flame tube 6 and the outer flame tube 7
A secondary flame f1 is formed above, and the unburned components rising in the combustion chamber 8 are completely combusted, so that good exhaust gas characteristics are exhibited. However, when the exposed height of the lamp wick 1 is lowered to reduce the amount of combustion, the flame descends into the combustion chamber 8 and is formed as shown at f2. In this case, the air holes 11 and through holes 17 of the inner flame tube 6
The flame f5 that was formed above is no longer formed above the flame f2. Conventionally, under such conditions, exhaust gas characteristics, particularly Co1002, have deteriorated rapidly. Furthermore, if the combustion device is used for a long time in a well-sealed room, the amount of combustion will gradually decrease as the oxygen concentration decreases, but as mentioned above, if the flame descends into the combustion chamber 8, a large amount of CO will be generated. I was in a situation where I would. As a result of measuring the exhaust gas inside the combustion device, it became clear that the main cause of the above phenomenon was the flow inside the inner flame cylinder 6. That is, the Co concentration at the line A-A' in FIG. 6 is 11 near the upper end during weak combustion (the state where the flame becomes f2 and descends into the combustion chamber 8).
There were more than 000pp. From this, it is clear that inside the inner flame tube e there is a flow leaking from the combustion chamber 8 to the inside of the inner flame tube 6 as shown by the broken line &, and this mixed gas containing high concentration of CO flows into the vent hole 1. The Co/Co2 characteristics deteriorate rapidly as the Co/Co2 is directly discharged into the atmosphere from the air hole 11 above the flame f2.

This phenomenon occurs even when the oxygen concentration decreases due to long-term combustion in a well-sealed room (oxygen deficient state).

The present invention solves such conventional problems by preventing rapid deterioration of exhaust gas characteristics during weak combustion or in oxygen-deficient conditions. The purpose is to obtain a combustion device that is

Means for Solving the Problems In order to solve the above-mentioned problems, the combustion device of the present invention has a combustion device that extends upward from the vicinity of the position facing the lamp wick inwardly of the inner flame cylinder;
The control area formed between the inner flame cylinder and the inner flame cylinder is shielded by its bottom surface,
Multiple flow control cylinders are provided in the vertical direction to form a ventilation section that communicates with the combustion chamber.

Effect of the present invention With the above-described configuration, unburned gas is introduced into the control area, and while being mixed by clean air supplied to the ventilation part above the flow restriction tube, the unburnt gas is intensively supplied from the ventilation part to the combustion chamber. to promote combustion. In addition, since a plurality of flow restrictor tubes are provided, the combustion gas flowing into the flow restrictor tubes above the flame becomes gas in which combustion has progressed, and a large amount of CO can be prevented from being released.

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

In FIG. 1, reference numeral 1 denotes a lamp wick, which is set between an inner wick tube 2 and an outer wick tube 3 so as to be vertically movable. The upper ends of the inner core cylinder 2 and the outer core cylinder 3 are each connected to an inner fire pan 4. It forms an outer flame plate 5, and an inner flame cylinder 6. An outer flame tube 7 is placed. During combustion, the tip of the wick 1 is exposed in a combustion chamber 8 formed between an inner flame tube 6 and an outer flame tube 7, where the fuel is vaporized. 9 is the outer cylinder and the inner flame cylinder 6. Outer flame tube7. The outer cylinders 9 are arranged approximately concentrically from the inside, and are integrated by a fixed pin 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 an inner flame tube top plate that closes the upper end opening of the inner flame tube 6, and has a ventilation hole 13 communicating upward from the inside of the inner flame tube e. 14 is a flame expansion plate placed on the top plate 12 of the inner flame tube. A constriction part 16 is formed at the upper end of the outer cylinder 9, and a glowing part 16 is formed in the outer flame cylinder 7 above the constriction part 15, and a through hole 17 with a large opening is provided. 18 is a heat transmitting tube made of a heat transmitting material such as glass, and is placed on the outer tube 9. 19 is the top frame, red hot part 1
It is placed on the upper end of the incandescent part 16 so as to cover the upper end of the air passage 2o between the heat transmitting tube 18 and the heat transmitting tube 18, and fixing the heat transmitting tube 18. 21 is a flow control tube installed inside the inner flame tube 6 °
It extends upward from near the position facing the tip of the lamp wick 1, and is provided so as to shield the control region 22 formed between the inner flame tubes 6 with its bottom surface. 23 is a flow control tube B set above the flow control tube 21, and like the flow control tube person 22, the flow control tube B is
24 with its bottom surface. Reference numeral 25 denotes a vent member that is set to have a constant distance between the flow restrictor member 21 and the flow restrictor member B23. Reference numeral 26 denotes a ventilation section B that is set to have a constant interval between the flow control tube B24 and the inner flame tube top plate 12. 2nd line is the air introduction path.

In the above configuration, when the lamp wick 1 is ignited, combustion starts,
High-temperature combustion gas from combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion flows into the inner flame tube 6.
The air is supplied into the combustion chamber 8 through the air hole 11 of the outer flame tube and the through hole 17 of the red-hot part 16, and combustion continues. The flow of combustion gas and air inside the inner flame cylinder 6 and the combustion chamber 8 at this time will be explained with reference to FIG. 2. Air supplied from inside the inner flame tube 6 is supplied from below the flow control tube 21 to the vicinity of the lamp wick 1 as indicated by the white arrow a.
The air introduction path 27 is divided into white arrows that ascend. A part of the rising air passes through the entire ventilation section 6 as indicated by the white arrow C and is supplied to the combustion chamber 8. Further, the air supplied above the inner flame cylinder 6 is supplied to the combustion chamber 8 and above from the air hole 11 and the vent hole 13 as shown by the white arrow d. Further, the negative part descends to the control area B24 as indicated by the white arrow e, and is also supplied to the combustion chamber 8 from the air hole 11 located relatively below. - On the other hand, the fuel vaporized by the air flow white arrow B becomes a mixed gas with air and rises in the combustion chamber 8 mainly as shown by the black arrow. However, since the control area arm 22 and the control area B24 become negative pressure due to the air flow arrows C, d, and e, a part of the mixed gas flows to the control area A22. It flows into the control area B24. Therefore, the control area A22. The control area B24 is filled with unburned gas. This unburned gas is vented to the ventilation section 251.
At 26, it is mixed with air flow C and air flow d, e, and the black arrow 1. It is again supplied to the combustion chamber 8 as shown in j. Therefore, during strong combustion, unburned gas and air are well mixed and supplied to the upper end of the combustion chamber 8 near the upper end of the inner flame cylinder 8, resulting in efficient combustion near the area C. The fuel gas is combusted by the flame fr formed above. Next, when the exposed height of the lamp wick 1 is lowered to reduce the amount of combustion, the flame gradually descends into the combustion chamber 8 and becomes the flame fs. The flow in this case is the same as that during strong combustion, but since the amount of vaporized gas is significantly reduced, the amount of unburned gas flowing into the control area B24 is also reduced. Therefore, the mixing area with the air flow arrow 0 moves downward, and the area near the area becomes a good mixing area, and a flame holding state is formed in this area, causing the wall surface of the inner flame tube 8 to become red hot.
Flame fs that promotes combustion and is formed above it
to complete combustion. In this case, most of the unburned gas that has flowed into the control area B24 is supplied to the combustion chamber 8 by the air flows d and e and is burned by the flame fs, so in the control area B24 facing above the flame fs, the unburnt gas component is The air discharged from the air holes 11 and 13 above the flame fs is clean and has low exhaust gas characteristics (CO/CO2).
does not get worse. Incidentally, it was found that the CO concentration near the ventilation section B2e was approximately 30 to 50 ppm, which was significantly reduced compared to the conventional example.

However, if the combustion amount is further reduced and the flame descends further, the temperature above the inner flame cylinder 6 will drop, so combustion will not be promoted even though sufficient air is supplied into the control area B24 by the air flow e. Therefore, the air discharged from above the flame fs gradually comes to contain a large amount of Go acid components, and the exhaust gas characteristics gradually deteriorate. However, if the combustion amount is further reduced and a flame is formed below the lower end of the flow control tube B23 like fm, the temperature near the flame fm will be high, and sufficient air will not be supplied by the air flow C from the ventilation part A26. Therefore, combustion is promoted near region E. In this case, the exhaust gas flows into the upper control region B24, but this exhaust gas component is in a state where combustion has progressed considerably in the flame fm, and G in the exhaust gas component.

The ratio is not that high. Therefore, the exhaust gas characteristics do not deteriorate.

The above has described the case where the exposure height of the lamp wick 1 is lowered to reduce the amount of combustion during normal combustion, but the same effect can be obtained when the lamp is burned for a long time in a well-sealed room. In other words, under oxygen-deficient conditions, the amount of combustion decreases as the oxygen concentration decreases, and a phenomenon similar to that observed when the exposed height of the wick 1 is lowered to reduce the amount of combustion is observed. The defect characteristics also become better.

Figure 3 shows Co versus thermal burnout for the conventional example and this example.
/CO2 characteristics, and FIG. 4 shows the results of measuring oxygen deficiency characteristics. In addition, the oxygen deficiency characteristic is initial combustion reservation 1250 Kca
It was measured as l/hr. In this example, both the CO/CO2 characteristics and the oxygen deficiency characteristics were significantly improved, and the effects of the present invention are clear.

Although the above embodiments have been described with regard to the case where the flow restriction tubes are arranged in two stages, the same or better effect can be obtained even if a configuration with three or more stages is adopted.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, the following effects can be obtained.

1) Since a fluid control is provided inside the inner flame, unburnt gas containing high concentration of CO flows into the control area due to the air flow rising through the air introduction path, but the air supplied to the ventilation section A good mixed state can be formed at a certain height of the inner flame tube depending on the amount of combustion, and combustion can be promoted.

2) The flow of unburned gas leaking into the inner flame cylinder is blocked by the air supplied from the vent. Due to this shielding effect, the control area above the flame and the air introduction path contain almost no unburned gas, and high concentrations of Go are directly released into the atmosphere from the inner flame tube air vents and vents above the flame. Never.

3) When the amount of combustion decreases further and the flame falls further, even though sufficient air is introduced into the control area, the temperature above the flame decreases, so combustion is not promoted sufficiently, and the amount of CO gradually increases. The CO/CO2 characteristics tend to gradually deteriorate. However, since multiple flow control tubes are provided, when the flame drops below the upper flow control tube, the air supplied from the ventilation section immediately above will cause the flame to rise again. Combustion is promoted, and the exhaust gas flowing into the upper control area becomes a gas with a low CO ratio that has undergone considerable combustion, so even if this combustion gas is released, it does not lead to deterioration of combustion characteristics.

The above effects prevent rapid deterioration of exhaust gas characteristics during weak combustion or in oxygen-deficient conditions, thereby providing a safe combustion device with good combustion characteristics and a wide range of combustion amount adjustment.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of essential parts of a combustion device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the flow of the combustion device, and FIGS.
The figure is a characteristic diagram for explaining the effects of the device, and FIG. 5 is a sectional view of the main part of a conventional combustion device. 1...Light wick, 6...Inner flame cylinder, End...
...Outer flame tube, 8... Combustion chamber, 9...
Outer cylinder, 11...Air hole, 21゜23...
・Flow control tube, 22.24... Control area, 25゜2e
...... Ventilation section. Name of agent: Patent attorney Toshio Nakao and 1 other person 2nd
Figure 3! (h Lx屓(7＠) Figure 5 Procedural amendment document June 1988-←Japanese Patent Application No. 145169 of 1988 2. Name of the invention Combustion device 3. Relationship with the person making the amendment Patent application Colonel Address 1006 Kadoma, Kadoma City, Osaka Prefecture Name
(582) Matsushita Electric Industrial Co., Ltd. Representative Tani
Akio I 4 Agent 571 Address 6, Matsushita Electric Industrial Co., Ltd., 1006 Oaza Kadoma, Kadoma City, Osaka Prefecture Contents of Amendment (1) The scope of claims column of the specification will be amended as shown in the attached sheet. (2) "Inwardly shielding the inner flame cylinder" on page 4, line 9 to page 4, line 11 will be corrected as follows. "A flange is provided inside the inner flame tube that extends upward from near the upper part of the firing material supply section and is located at the bottom of the control area formed between the inner flame tube and the inner flame tube." (3) Same page 5. Correct "1 is the lamp wick" in line 6 to "1 is the lamp wick, which is the fuel supply part." (4) On the bottom of the same page 6, lines 10 to 11,
It is provided. " is corrected to "There is a flange 21a located at the bottom of the." (4) In page 6, lines 13 to 14 of the same page, "is provided on its bottom." is corrected to "is provided with a flange 231L located at the bottom." (6) Figure 2 of the drawing has been corrected as shown in the attached sheet. 2. Claims: An outer flame tube having a large number of air holes, and an inner flame tube having a large number of air holes arranged on the side of the outer flame tube. , an outer cylinder located outside the outer flame cylinder, a fuel supply part provided at a lower end of the combustion chamber formed between the outer flame cylinder and the inner flame cylinder, and a fuel supply part disposed inside the inner flame cylinder. , a flange extending upward from near the upper part of the fuel supply part and located at the bottom of a control area formed between the inner flame tube and the inner flame tube is provided, and a ventilation part communicating with the combustion chamber is formed between the upper and lower parts. A combustion device equipped with multiple stages of flow control cylinders.

Claims (1)

[Claims] an outer flame tube having a large number of air holes; an inner flame tube having a large number of air holes disposed outside the outer flame tube; an outer tube located outside the outer flame tube; and an outer flame tube. and a lamp wick provided at the lower end of the combustion chamber formed between the inner flame cylinder and the lamp wick, which is movable up and down; A combustion device comprising a plurality of stages of flow control tubes that are provided so as to shield a flow control region formed between the flame tube and the flame tube with their bottom surfaces, and to form a ventilation section communicating with the combustion chamber between the upper and lower sides.