JPS604709A - Combustion cylinder - Google Patents

Abstract

PURPOSE:To widen a range of variable combustion volume and to prevent noxious exhaust gas from being generated by a method wherein a pressure loss plate and an adjuster plate are interlocked with each other in such a way as the area of the secondary air passage is made minimum in case of a maximum area of the opening at the upper end of a red heating cylinder. CONSTITUTION:During maximum combustion, a pressure loss plate 16 is placed at the upper position, has a wide clearance between it and the upper red heating cylinder 11 and at the same time an adjusting plate 13 closes a part of the secondary air adjusting hole 12a. In case of a minimum combustion, the pressure loss plate 16 is descended and the secondary air adjusting hole 12a is fully opened. Thereby, it becomes possible to widen the range of variable combustion volume and at the same time to restrict the generation of noxious exhaust gas such as carbon monoxide, etc. in the wide variable range.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustion tube for a liquid combustion device widely used in household heaters and the like.

Conventional configuration and its problems A combustion chamber is formed by an inner flame tube and an outer flame tube that have many small holes, and the high-temperature gas heats the red-hot body located above, such as a wire mesh or punched methanoperas. Red-hot combustion tubes are the mainstream of home heaters such as portable kerosene stoves. .

Conventionally, this type of combustion tube has the configuration shown in FIG. 1 in many cases. That is, numeral 1 is a lamp wick, and although the lower end is omitted in the figure, it penetrates into the fuel in the combustion tank provided at the bottom, and the upper end is exposed in the combustion chamber 7. 2 is an inner flame tube having a large number of small holes, and 3 is an outer flame tube having a large number of small holes, and a combustion chamber is formed in the gap between the inner flame tube 2 and the inner flame tube. 4 is connected to the top of the outer flame tube 3, and has a high red heat ratio such as Ranu, bunch metal, wire mesh, etc., which has a higher opening rate than that of the outer flame tube 3.
is an outer cylinder made of a heat-resistant light-transmitting material such as glass; 6 is a metal outer cylinder that holds the outer cylinder 5; 7 is an upper lid that is connected to the inner flame cylinder 2 and has an air hole; 8 is fixed to the upper lid 7. This is a flame regulating plate.

In the above configuration, in a steady combustion state, the fuel gas vaporized from the tip of the lamp wick 1 is passed through the small holes of the inner flame tube 2, the outer flame tube 3, and the opening of the incandescent tube 4 through the air supplied by the natural trough 1-. While partially combusting, the air (secondary air) supplied from the air hole in the final upper cover 7 completely burns the air.

In this type of combustion system, the air supply (primary air) up to the secondary combustion position (the position where secondary air is supplied) is extremely dispersed (supplied from small holes and one opening). Therefore, there is a large amount of unburned gas in the lower part of the combustion chamber, and as you move toward the upper part, the unburned gas becomes dilute, making complete combustion difficult. A method has been used in which air is intensively supplied to the secondary combustion section to achieve complete combustion while leaving the components remaining.

However, in this configuration, since the method of varying the exposed height of the lamp wick 1 to the combustion chamber is used as a means of adjusting the combustion amount, even if the exposed height of the lamp wick 1 is reduced and the amount of vaporization is reduced, The amount of air supplied by the draft is hardly reduced, the ratio of air to fuel increases, and as the combustion is mostly dispersed by the primary air, the unburned gas components in the secondary combustion section are concentrated, resulting in incomplete combustion. was likely to occur. Therefore, optimal combustion with low carbon monoxide and odor generation [i range is 200 kcal/h for appliances rated at 2100 kcal/h]
It was impossible to obtain up to 300 kcal/h L.Objective of the InventionThe present invention solves such an opening point. It is an object of the present invention to provide a P baking machine that generates less malignant exhaust gas such as carbon monoxide within a certain range.

Structure of the Invention In order to achieve this object, the present invention provides an upper glowing tube at the upper part of the inner flame tube through a secondary air port, and also includes a pressure loss plate and a secondary An adjustment plate is provided to vary the passage of secondary air supplied to the air port, and when the area of the opening at the upper end of the glowing cylinder is maximum, the area of the secondary air passage is adjusted with a pressure loss plate to minimize the area. It is linked with the board.

In this 4115 configuration, when the area of the opening is maximum, the draft generated in the combustion cylinder is maximum9 and the calorific value is also maximum, but at the same time, by minimizing the secondary air passage area92 Since the amount of primary air is suppressed and the amount of primary air is increased, premixing is promoted, yellow flame of the secondary flame is suppressed and blue combustion can be achieved despite the large calorific value.

In addition, when the area of υ121 is the minimum, the calorific value is also the minimum, and at the same time, the amount of secondary air increases in a 4'l:I direction, and the amount of primary air decreases, preventing excessive primary combustion. As a result, generation of malignant exhaust gases such as carbon monoxide can be prevented.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 2 and 3.

In Figure 2, 1 is a fuel tank, 2 is a fuel, 3 is a cylindrical lamp wick whose lower end is immersed in the fuel 2 and whose upper end is exposed in the combustion chamber of the combustion tube, and 4.5 is a cylindrical lamp wick with the gap between the wicks 3 and 3. These are a wick guide tube and a wick outer tube that move up and down and regulate the vaporization area of the wick 3. 6 is a cylindrical inner flame tube with many small holes, 7 is a cylindrical outer flame tube with many small holes, 8 is a cylindrical outer tube made of a heat-resistant light-transmitting material such as glass, and 9 is a cylindrical outer flame tube made of a heat-resistant light-transmitting material such as glass. Hold the outer cylinder 8,
The inner flame tube 6, the outer flame tube 7, and the metal outer tube 9 are held approximately concentrically from the inner to the outer side by cross pins or the like. Reference numeral 10 indicates a lower incandescent tube, which is connected to the outer flame tube 7 and is made of lame, bunchinkmekuru, wire mesh, etc.;
Reference numeral 11 designates an upper glowing tube that is connected to the inner flame tube 6 via a secondary air port 14, and 12 is a rectifying plate having a secondary air adjustment hole 12a. 13 is an adjustment plate fixed to the adjustment shaft 17,
By opening and closing the secondary air adjustment hole 12a,
Adjust the amount of secondary air. 15 is an auxiliary exhaust port, and 16 is a pressure drop plate, which is fixed to the adjustment shaft 17 and is moved up and down to open and close the opening at the top of the upper glowing tube 11 and adjust the amount of air supplied to the entire combustion tube.

When the tip of the lamp wick 3 is ignited in the configuration described above, the combustion heat and the air supplied from the small holes at the bottom of the outer wick tube 5 and the inner flame tube 6 by natural draft (draft action caused by heat). The fuel is vaporized by the flow, which is mixed with air supplied to the combustion chamber through the small holes in the inner flame cylinder 6 and the outer part 7 and the opening of the lower glowing cylinder 10, and is combusted.

The combustion heat generated in the primary combustion chamber formed by the gap between the lower glowing tube 10 and the inner flame tube 6 causes the lower glowing tube 10 to become red hot, and the remaining unburnt gas is replaced by air supplied from the secondary air 1'' 14. The high-temperature υ1 gas flows along the upper glowing tube 11 while making it red hot, and passes through the opening 1 and the auxiliary 1. J[Air is discharged from the combustion cylinder from D'15.

Although FIG. 2 shows the maximum combustion, the pressure loss plate 16 is located on one side and has a wide gap with the upper glowing tube 11, and at the same time the adjustment plate 13 is located at the secondary air adjustment hole 12a. Part of the area is blocked. In this state, the flow resistance in the empty air passage of the combustion tube is small, so that the amount of air is maximized. If the amount of secondary air is still suppressed in the inner flame tube 6, the air 11 supplied into the combustion chamber from the small holes of the inner flame tube 6 also reaches its maximum.

Therefore, since the amount of air supplied from the vicinity of the lamp wick 3 is maximized, the amount of vaporization (amount of fuel*a) is also maximized.

Figure 3 shows the minimum combustion 'L, when the pressure drop plate 16 is lowered and 7
The opening 1'' at the mouth end of the upper glowing tube 11 is closed, and at the same time the adjustment plate 13 lowers and the secondary air adjustment hole 12a is closed.
is fully open. Therefore, the exhaust gas exhaust passage from the combustion tube is limited to the auxiliary exhaust port 15.]J (The pile becomes the maximum, and the amount of air supplied to the combustion tube and cylinder is also minimized.At the same time, the amount of air supplied to the lamp wick 3 and the hook is The amount of air flowing into the air also decreases, causing vaporization.
t (combustion) 11) is also minimized.

If the adjustment plate 13 is not installed in this 1 Samurai, the ratio of the primary air amount (air supplied from the small hole in the inner flame tube) to the secondary air amount will be constant during maximum combustion and minimum combustion. To,
If the ratio of primary air and secondary air is set so that optimal combustion occurs at maximum combustion, the air passage 1j1 decreases at minimum combustion, which reduces the rising speed of the mixed gas and prevents primary combustion. In the secondary combustion section, the unburned gas is in a diluted state, and combustion by the secondary air is repeated.

Therefore, in order to obtain good combustion within a wide −J variation range of combustion h), the total air amount must be varied and at the same time the maximum combustion
In the process leading to small combustion, the primary air h1
It is necessary to reduce the ratio of primary air to increase the concentration of unburned gas in the secondary combustion section, and to achieve complete combustion by intensively supplying secondary air, there are four effects: It is.

Note that FIG. 4 shows the characteristics of this embodiment (solid line) and the conventional example (broken line), and it can be seen that this embodiment is superior.

Effects of the Invention The present invention interlocks the pressure loss plate that adjusts the total amount of air supplied to the combustion tube and the adjustment plate that adjusts the amount of secondary air, thereby 1) always achieving the optimum combustion temperature within a wide variable range of combustion It becomes possible to carry out combustion, and - the amount of malignant exhaust gases such as carbon oxides generated can be reduced.

[Brief explanation of drawings]

FIG. 1 is a sectional view of a main part of a conventional example, FIG. 2 is a sectional view showing an embodiment of the present invention at maximum combustion, and FIG. 3 is a sectional view of an embodiment of the present invention at minimum combustion. FIG. 4 is a characteristic diagram of exhaust gas in a conventional example and an example of the present invention. 6...Inner flame tube, 7...Outer flame coat゛1.8...
Outer cylinder, 9...metal outer cylinder, 10...-1: part incandescent cylinder, 11... upper incandescent cylinder, 13...adjustment plate, 16...pressure loss plate , 17... Adjustment rod. Name of the current person ``Riki'' Nakao 1 Masa Male Haga 1 person Figure 1 Figure 2 Figure 3 Figure 4 Color development f- (K-effect

Claims (2)

[Claims] (1) An inner flame tube having a large number of small holes, an outer flame tube and a metal outer tube are arranged concentrically from the inside to the outside, and a light-transmitting outer tube such as glass is placed above the metal outer tube. of the external light tube
The second part is a lower glowing tube made of wire mesh, bunched metal, Ranu, etc., and the second part of the inner flame tube is provided with an upper glowing tube through a secondary air port, and the opening at the end of the upper glowing tube. A pressure drop plate that changes the area of the secondary air passage and an adjustment plate that changes the area of the secondary air passage supplied to the secondary air port are provided. A combustion tube in which a pressure drop plate and an adjustment plate are linked to minimize the area of the secondary air passage. (2) The combustion tube according to claim 1, in which a pressure loss plate and an adjustment plate are fixed to one adjustment rod.