JPH0297807A - Combustion device - Google Patents

Abstract

PURPOSE:To reduce the emission of CO when the combustion is turned down so as to widen the adjustability range of the combustion by dividing a gas permeable cylinder into an upper and a lower parts, by making the upper gas permeable cylinder larger in inside diameter than the lower gas permeable cylinder, and by providing a control ring projecting toward the outer flame cylinder at the joint between the upper and the lower gas permeable cylinders. CONSTITUTION:The air taken in from the outer side is separated by a throttle 15 at the top end of an outer cylinder 9 into a supply through air holes 11 in an outer flame cylinder 7 and a supply through through-holes 17 at a red heat section 16, both supplies led into a combustion chamber 8. In thus supplying air, it occurs that a part of the unburned gas in the combustion chamber 8 leaks into an air passage 21 at the part opposite to the throttle 15, and this phenomenon worsens CO/CO2 at a time of low combustion. In consideration of this phenomenon, a control ring 19 is provided as a means of returning into the combustion chamber 8 the unburned gas which has leaked into the air passage 21, so that by its recombustion the degree to which CO/CO2 is worsened can be reduced to a half. As a result, the combustion can be turned down sharply and the adjustability range of the combustion is widened. Since an upper gas permeable cylinder 18b has a larger inside diameter than the lower gas permeable cylinder 18a, the space between the upper gas permeable cylinder 18b and the outer flame cylinder 7 tends to have a negative pressure so that the face C of the flame in the combustion chamber is drawn to the outer side and the air is reduced, and thus luminous flames are less liable to occur.

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. 2, the tip of the wick 54, which is a fuel supply section, is exposed in the combustion chamber 53 between the inner flame tube 51 and the outer flame tube 52, which have a large number of air holes, to vaporize and burn the fuel. It has become. Normally, the outer flame cylinder 52 forms a red-hot part 56 having a through hole 56a with a large opening area above the constricted part 55a of the outer cylinder 55, and the fuel vaporized from the lamp wick 54 flows through the through hole 56a into the combustion chamber 5. The air introduced into the chamber was mixed and combusted, causing the red-hot section 56 to become red-hot to obtain radiant heat.

Problems to be Solved by the Invention However, the above conventional configuration has caused the following problems. That is, in FIG. 2, solid arrows indicate the flow of air, and dashed arrows indicate the flow of unburned gas. As is clear from this drawing, in the conventional combustion device, unburned gas leaks to the outside of the outer flame tube 56, and when the combustion amount is reduced, it flows upward and increases Col. It was not possible to widen the combustion amount adjustment.

The present invention was made in view of these points, and it aims to reduce the amount of CO when the combustion amount is reduced, widen the period during which the combustion amount is being adjusted, and provide a safe and comfortable combustion device that does not have any practical problems. It is intended to provide.

Means for Solving the Problems In order to solve the above problems, the combustion device of the present invention divides the transmission cylinder into upper and lower parts, makes the inner diameter of the upper side of the transmission cylinder larger than the inner diameter of the lower side, and A control ring that protrudes toward the outer flame tube is provided at the connection part of the tube.

According to the above-described structure, the present invention allows the control ring to return unburned gas leaking to the outside of the outer flame cylinder into the combustion chamber and re-burn it, thereby preventing deterioration of the exhaust gas characteristics (Co/Cot).

Example Embodiments of the present invention will be described below 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 form an inner fire pan 4 and an outer fire pan 5, respectively.
An inner flame tube 6 and an outer flame tube 7 are placed. The tip of the wick 1 is connected to the combustion chamber 8 formed between the inner flame tube 6 and the outer flame tube 7 during combustion.
The combustion vaporization takes place here. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are sequentially arranged approximately concentrically from the inside and are integrated by a fixing pin 10.

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 an opening 13 that communicates upward from the inside of the inner flame tube 6. 14 is a flame expansion plate placed on the top plate 12 of the inner flame tube. A constriction part 15 is formed at the upper end of the outer cylinder 9, and a red-hot part 16 is formed in the outer flame cylinder 7 above the constriction part 15.
is formed, and a large through hole 17 is provided.

18a is a lower transmission tube, and 18b is an upper transmission tube, which are made of a transmission material such as glass. A control ring 19 connects and fixes the lower transmission tube 18a and the upper transmission tube 18b, and projects toward the outer flame tube 7 side. A top frame 20 is placed on the upper end of the red-hot part 16 so as to cover the upper end of the air passage 21 between the red-hot part 16 and the upper transmission cylinder 18b, and fixes the upper transmission cylinder 18b.

In the above configuration, when the lamp wick 1 is ignited, combustion starts, and high-temperature combustion gas due to combustion rises in the combustion chamber 8, creating a thermal draft, and the air necessary for combustion is supplied to the air holes in the inner flame tube 6 and outer flame tube 7. 11 and the through hole 17 of the red-hot part 16 into the combustion chamber 8, and combustion continues.

At this time, air from the outside is divided by the constriction part 15 at the upper end of the outer cylinder 9 into air from the air hole part 11 of the outer flame cylinder 7 and air from the through hole 17 of the red-hot part 16, and each is supplied into the combustion chamber 8. At this time, flame holding is formed in the air holes 11 of the outer flame tube 7 and the through holes 17 of the red-hot part 16, but a part of the unburned gas in the combustion chamber 8 flows through the air passage in the part facing the throttle part 15. The phenomenon of leakage to 21 is the springing, and a part of it is directly discharged from the upper part of the through hole 17 of the red-hot part 16, so when the combustion is low, Co/C
aggravate oz. In order to reduce this, the control ring 19 mentioned above is provided, and the unburned gas leaking into the air passage 21 is returned to the combustion chamber 8 as shown by the black arrow A, and is re-burned and converted into Co/Co□. Reduce deterioration by half. Therefore, the amount of combustion can be reduced to a low point, and the amount of combustion can be widened during combustion adjustment. At this time, a large amount of air B enters from the protruding part of the control ring 19, causing the flame in the combustion chamber to move inward, causing local combustion on the flame surface C and causing yellow flame. The inner diameter of the upper transmission tube 18b is larger than that of the lower transmission tube 18a.
The space between the combustion chamber and the outer flame cylinder 7 has a slightly negative pressure, and the flame surface C of the combustion chamber is moved to the outside, and the amount of air is also reduced, making it difficult for yellow flame to occur. Therefore, stable combustion is achieved without generating yellow flame.

Note that the same effect can be obtained if the transmitting tube itself can be precisely molded in one piece by making the inner diameter of the lower part smaller and the inner diameter of the upper part larger.

Effects of the Invention As described above, according to the combustion apparatus of the present invention, the exhaust gas characteristics (CO/CO1) can be improved in a wide range of combustion, and the combustion amount can be adjusted more widely. A practically comfortable combustion device that does not generate yellow flame can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a combustion device showing an embodiment of the present invention, and FIG. 2 is a sectional view of a combustion device showing a conventional example. 1...Light wick, 6...Inner flame cylinder, 7...
...Outer flame tube, 8... Combustion chamber, 9...
Outer tube, 11...Air hole, 16...Outer flame tube red-hot part, 18a...Lower transmission tube, 18b...
... Upper transmission tube, 19 ... Control ring.

Claims (1)

[Claims] an outer flame tube consisting of a pore section having a large number of air holes and a red-hot section formed above the pore section, an inner flame tube having a large number of air holes disposed inside the outer flame tube, and the outer flame tube. An outer cylinder located outwardly, a transparent cylinder placed above the outer cylinder, and a lamp wick that is vertically movable and set at a lower end of a combustion chamber formed between the outer flame cylinder and the inner flame cylinder. The transmitting tube is divided into upper and lower parts, and the inner diameter of the upper side of the transmitting tube is larger than the inner diameter of the lower side, and a control ring is provided at the connecting part of the upper and lower transmitting tubes to protrude toward the outer flame tube side. Combustion device provided.