JPH01247904A - Combustion device - Google Patents

Abstract

PURPOSE:To reduce the amount of unburnt gas, such as carbon monoxide, in the exhaust gas even at the time of low combustion by providing a flow-straightening ring which projects inward from the inner side of an outer flame cylinder rearly at the boundary between the part having air holes and the red heat part. CONSTITUTION:When the exposure of a wick 1 is lowered in height to reduce the amount of the combustion, the position at which the flame is formed is lowered; because of a failure of the flame in reaching the upper part of the combustion chamber 8 the combustion gas containing some unburnt gas reentering the combustion chamber through the upper part of the red heat part 16 undergoes no further combustion or any change before it is exhausted in a mixture with burnt gas, hence causing occurrence of carbon monoxide and offensive odor. By means of a flow straightening ring 21 provided on the inner side of an outer flame cylinder 7, the flow of the combustion gas which rises in a combustion chamber 8 is straightened in direction and turned toward an inner flame cylinder 6 so that the flow is separated from the outer flame cylinder 7 at the red heat part 16; a considerable decrease results with respect to the amount of the combustion gas which diffuses through openings 17 into an air flow passage 20. Hence a decrease can be achieved in the amount of unburnt gas in the combustion gas exhausted even when the amount of the combustion is low.

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 A kerosene stove, which has been widely used as this type of combustion device, is generally of the type shown in FIG. No.
In the figure, reference numeral 1 denotes a lamp wick which freely moves up and down between an inner wick tube 2 and an outer wick tube 3. The upper ends of the inner core tube 2 and the outer core tube 3 form an inner flame tube 4 and an outer flame tube 5, respectively, and an inner flame tube 6 and an outer flame tube 7.
is placed. The tip of the wick 1 becomes the inner flame cylinder 6 during combustion.
It is exposed in a combustion window 8 formed between the outer flame tube 7 and the outer flame tube 7, and the fuel is vaporized there. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are arranged approximately concentrically in order from the inside and are approximately fixed by fixing pins 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 internal combustion cylinder top plate that closes the upper end opening of the internal combustion cylinder 6, and has a ventilation hole 13 communicating upward from the inside of the internal combustion cylinder 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, and a large through hole 17 is provided. Reference numeral 18 denotes a transparent tube made of a transparent material such as glass, and is placed on top of the outer tube 9. A top frame 19 is placed on the upper end of the red-hot part 16 so as to block the upper end of the air passage 2o between the red-hot part 16 and the transmission cylinder 18, and fixes the transmission cylinder.

In the above configuration, when the lamp wick 1 is ignited, the fuel vaporizes and starts combustion. The fuel continues to vaporize due to the heat of combustion, and the heat draft generated in the combustion chamber 8 necessary for combustion causes the air holes 11 of the inner flame tube 6, the outer flame tube 7, and the red-hot part 1 to
The fuel is supplied into the combustion chamber 8 through the through hole 17 of the fuel cell 6, continues combustion, and heats the red-hot part 16 to become red-hot, which is then used as radiant heat for heating and the like.

Problems to be Solved by the Invention According to such conventional means, when the exposed height of the lamp wick 1 is lowered to reduce the amount of vaporization and combustion, no flame is formed in the upper part of the combustion chamber 8 and the combustion chamber 8 Either the unburned gas diffuses into the air introduction passage 20 through the lower hole 17 of the red-hot tube 16, or the combustion exhaust gas is mixed with the combustion exhaust gas and discharged through the upper hole 17 without passing through the high-temperature flame zone. The problem is that the amount of carbon monoxide and unburned components that cause odor increases.

Means for Solving the Problems In order to solve this problem, the present invention has a configuration in which a ring-shaped rectifier ring that projects inward is provided near the boundary between the air hole portion and the red-hot portion inside the outer flame tube. It is.

Function In the above configuration, the vaporized fuel gas at the bottom of the combustion chamber diffuses and mixes with the air supplied from the air holes of the inner and outer flame tubes and rises inside the combustion chamber while burning. Due to the straightening ring, the flow is separated from the inner surface of the outer flame tube at the through hole portion of the outer flame tube, and the amount of unburned gas that diffuses into the air introduction passage through the through hole is greatly reduced. Therefore, even when the amount of combustion is reduced and no flame is formed in the upper part of the combustion chamber, carbon monoxide and other unburned gases contained in the exhaust gas can be reduced.

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

In FIG. 1, a lamp wick 1 is set to move freely up and down between an inner wick tube 2 and an outer wick tube 3, and its lower end is immersed in fuel in a fuel tank (not shown).

The upper ends of the inner core tube 2 and the outer core tube 3 form an inner flame tray 4 and an outer flame tray 5, respectively, on which an inner flame tube 6 and an outer flame tube 7 are 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. Reference numeral 9 denotes an outer cylinder, and the inner flame cylinder 6, outer flame cylinder 7, and outer cylinder 9 are substantially fixed in a substantially concentric manner from the inside by fixing pins 10.

Reference numeral 11 denotes 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 a ventilation hole 13 leading from the inside of the inner flame tube 6 to the upper side.
have. Reference numeral 14 denotes a flame expansion plate connected to the top plate 12 of the inner flame tube. A constriction part 15 is formed at the upper end of the outer cylinder 9,
Further, the outer flame cylinder 7 above the constriction part 15 has a red-hot part 1.
6 is formed, and a large through hole 17 is provided.

18 is a transparent tube made of a transparent material such as glass, and the outer tube 9
is placed on top. A top frame 19 is placed on the upper end of the red-hot part 16 so as to block the upper end of the air flow path 20 between the red-hot part 16 and the transmission cylinder 18, and fixes the transmission cylinder 18. Reference numeral 21 denotes a rectifying ring, which is provided almost inside the boundary between the pores 11 of the outer flame cylinder 7 and the red-hot part 16.

In the above configuration, when the lamp wick 1 is ignited, the fuel vaporizes and starts combustion. The fuel continues to vaporize due to the combustion heat, and the air necessary for combustion is supplied into the combustion chamber 8 through the air holes 11 of the inner flame tube 6 and outer flame tube 7 by a thermal draft generated in the combustion chamber 8, and the fuel is vaporized. It diffuses and mixes with the gas and rises in the combustion chamber 8 while burning. In the vicinity of the red-hot part 16 of the outer flame cylinder 7, high-temperature combustion gas containing unburned components rises near the inner surface of the red-hot part 16 and heats the red-hot part 16 to red-hot. The radiant heat generated from this red-hot surface is used for heating. At this time, a part of the combustion gas diffuses into the air passage 20 through the through hole 17 of the red hot part 16, mixes with the air supplied from below, and is introduced into the combustion chamber 8 again through the through hole 17 in the upper part of the red hot part 16. do. When the exposed height of the lamp wick 1 is high and the amount of combustion is large, the combustion gas containing unburned components reintroduced from the air flow path 20 through the upper part of the red-hot part 16 is combusted to form a flame in the upper part of the combustion chamber 8. The amount of unburned components that are combusted by the flame in the upper part of the chamber 8 and contained in the combustion exhaust gas is extremely small. However, if the exposure height of the lamp wick 1 is lowered to reduce the amount of combustion, the position where the flame is formed will be lowered, and since there will be no flame in the upper part of the combustion chamber 8, the unburned components reintroduced through the upper part of the red-hot part 16 will be reduced. The combustion gases contained therein are not combusted and are mixed with the combustion exhaust gas and discharged as they are, causing carbon monoxide and odor. According to the configuration of the present invention, the combustion gas rising inside the combustion chamber 8 is rectified in the direction of the inner flame tube 6 by the rectifying ring 21 provided inside the outer flame tube 7, and leaves from the red-hot part 16 of the outer flame tube 7. . For this purpose, the air flow path 20 is passed through the through hole 17.
The diffusion of combustion gas was significantly reduced, and even when the amount of combustion was small, the amount of unburned gas contained in the combustion exhaust gas was also reduced. An example of the results is shown in FIG.

Effects of the Invention As is clear from the above explanation, the combustion apparatus of the present invention has a structure in which a ring-shaped rectifier ring that protrudes inward is provided approximately at the boundary between the air hole portion and the red-hot portion inside the outer flame tube. By doing so, 1) the amount of unburned components contained in the combustion exhaust gas is small even when the amount of combustion is small;

2) There is no generation of carbon monoxide or odor, and the combustion amount can be adjusted over a wide range from large to small combustion amounts.

The following effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a combustion apparatus according to an embodiment of the present invention, FIG. 2 is a sectional view of a main part of a conventional example, and FIG. 3 is a characteristic diagram of an embodiment of the present invention and a conventional example. 1...Light wick, 6...Inner flame cylinder, 7...
...Outer flame tube, 8... Combustion chamber, 9...
Outer cylinder, 11... Air hole, 16... Red-hot part, 17... Through hole, 21... Rectifier ring. Name of agent: Patent attorney Toshio Nakao and 1 other person/-
--Lamp wick 6-Inner flame tube 7--1 Tato moxibustion tube 11--1 茫ki】shi 16-Kotakushi figure 2

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, a lamp wick vertically movable at a lower part of the combustion chamber formed by the outer flame cylinder and the inner flame cylinder; A combustion device equipped with a ring-shaped rectifier ring that protrudes inward almost inside the boundary between the pores and the red-hot part of the outer flame tube.