JPS58182007A - combustor - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a dual-tube type combustor having an inner flame tube and an outer flame tube each having a large number of small holes.

A combustion chamber is formed between an inner flame cylinder and an outer flame cylinder with many small holes, and the high-temperature gas flow heats red-hot material such as wire mesh, punched metal, lath, etc. The combustor is used for home use such as portaple oil stoves. 24. As a heater, it does not require a power source, is small and lightweight, and is convenient to move. one.

It has many advantages such as being less harmful and providing comfort through radiant heating, making it the most popular heater for home use.

Conventionally, the combustion tube of this ridge has the configuration shown in Figure 1. That is, 1 is a lamp wick whose lower end is omitted in the figure, but is immersed in fuel in a fuel tank provided at the bottom, and its upper end is exposed throughout the combustion chamber. Reference numeral 2 denotes an inner flame tube having a large number of small holes, and numeral 3 an outer flame tube having a large number of small holes.A combustion chamber A is formed in the gap between the inner flame tube 2 and the inner flame tube. Reference numeral 4 denotes an outer cylinder made of an N1 lath, punched metal, wire mesh, etc., which is connected to the outer flame cylinder 3, and an incandescent cylinder 5 whose aperture ratio is larger than that of the outer flame cylinder 3 is made of a heat-resistant light-transmitting material such as glass. , 6 is a metal outer cylinder that holds the outer cylinder 5, and 7 is an air fL continuously thrown onto the inner flame cylinder 2.
8 is a flame regulating plate fixed to the upper lid 7.

In the above configuration, in a steady combustion state, the fuel gas vaporized from both ends of the lamp wick 1 is transferred to the inner flame tube 2. Outer flame tube 3. The mixture is mixed with air supplied by natural draft through the small holes and openings of the incandescent tube 4, and is partially combusted, while being completely combusted by the air (secondary air) supplied through the air holes of the final upper lid 7.

In this type of combustion system, the air supply (primary air) leading to the secondary combustion position (position where secondary air is supplied) is extremely dispersed (inner, outer flame tube 2, Because it is supplied from the small hole of 3), there are many unburned gas components in the lower part of combustion 4A, and in the upper part /! i: As the temperature increases, the unburned gas component becomes dilute, making complete combustion difficult. Therefore, a method has been used in which the entire amount of unburned gas is supplied in a concentrated manner to achieve complete combustion. However, in this method, the combustion heat obtained by secondary combustion does not contribute to the red heat of the glowing cylinder 4, so the ratio of radiant energy to the amount of fuel consumed is low and the radiation efficiency is poor, and the exposed height of the lamp wick 1 is high. Even if you feel the vaporization of the fuel by lowering the combustion level, there is almost no change in the red-hot condition of red-hot direction 4, just because the flame in the secondary combustion part decreases. In order to prevent the lamp from becoming very low, the exposed height f of the wick 1 is further lowered and used for one cycle, resulting in poor combustion due to excess air, which causes the generation of dredged carbon and odor.

The purpose of the present invention is to eliminate all of these drawbacks, and to provide a combustor that is visually beautiful and easy to use by increasing the radiation efficiency by widening the radiation area and creating a uniform glowing state. It is something to do.

In order to achieve all of these objectives, the present invention provides a cylindrical upper glowing tube above the secondary combustion section (secondary air supply section), and
- The opening ratio per unit area of the upper glowing tube is smaller than the opening ratio of the lower glowing tube.

Since the aperture ratio of the incandescent cylinder in the - part does not directly affect combustion, it is possible to select an arbitrary aperture ratio, and by making it small as described above, it is possible to obtain uniform red heat, and the incandescent area ( By increasing the area (area other than the opening), the radiation area can be expanded and radiation efficiency can be increased.

Hereinafter, one embodiment of the present invention will be explained with reference to FIG. 2.

In FIG. 2, 1 is omitted from the figure, or the lower end is immersed in a combustion tank provided at the bottom, and the upper end is immersed in a combustion tank 51. .

A cylindrical lamp wick protrudes into the burning chamber, 2 is a cylindrical inner flame tube with many small holes, and 3 is a cylindrical outer flame tube with many small holes. The high-temperature υ1 gas burned in the combustion section and some of the combustion flame heat up part of the incandescent tube in the process of rising while coming into contact with the incandescent tube V in the -F section, but due to its small aperture ratio, the high-temperature exhaust gas flow A small amount of the heat flows into the inside of the incandescent cylinder through the entire opening, and rises along the outward direction of the upper incandescent cylinder, causing the entire incandescent surface to become red-hot evenly. By the way, if the open ratio is large, due to the nature of the high-temperature exhaust gas, it will flow in the direction of low resistance, so it will flow inward from the open part at the bottom of the red-hot cylinder, and only that part will be red-hot, and the top part will have an extremely low red-hot temperature. become a state.

On the other hand, the opening ratio of the lower glowing tube is limited to a certain range because the opening is used to supply air necessary for primary combustion. An outer flame tube, 4 is a cylindrical lower incandescent tube made of lath, punched metal, wire mesh, etc. and is connected to the outer flame tube 3, 5 is an outward cylindrical tube made of a heat-resistant light-transmitting material such as glass, 6d , outer f=) 5 with a circular metal outer station that holds the whole, and an inner flame station 2. Outer flame tube 3. The metal outer cylinder 6 is held substantially concentrically with cross pins or the like. 7C1 is a disc-shaped separator connected to the inner flame tube 2, 8 is an upper glowing tube made of lath, punched metal, wire mesh, etc., and its opening ratio per unit area is I'', that of the lower glowing tube 4. Eli is getting smaller.

9 is an indigenous type that has an 8-karat gold upper glowing cylinder, and has 11 air holes. 10 is an air port (secondary air port) provided between the inner flame cylinder 2 and the upper glowing cylinder 8.

In the above configuration, when the tip of the lamp wick 1 is ignited, the combustion heat and the inner flame tube 2. The fuel is vaporized by the air l# supplied from the small hole at the bottom of the outer flame tube 3 to the natural draft, and the fuel is vaporized by the air L# supplied to the inner flame tube 2. Evening] All small holes of flame tube 3 and lower glowing tube 4
It burns while mixing with the air fed into the open part J and the air fed in.

Primary combustion formed in the gap between the upper glowing tube 4 and the inner flame tube 2
The combustion heat generated in step 12 makes the lower glowing cylinder 4 red hot, and the remaining unburned gas mixes with the air supplied from the final secondary air [110] and is completely combusted, resulting in a madder temperature exhaust gas of -1
A part of the air rises along the glowing cylinder 8 and is released to the outside at the -L opening of the upper part of the glowing cylinder 8. It has the property of converging to the center of the upper incandescent cylinder 8 from -F to the center, but by reducing the open Ll ratio of the upper incandescent cylinder 8, the resistance increases. The main stream is] - along the outer surface of the incandescent tube 8] 2 rises 1-7 (some of the flow n flows into the inside Vc from the [ ) 11 part) air port 11
J, the external VC is extracted. In the process of rising, the flow of exhaust gas at the station part causes the red-hot tube 8 to become red-hot, as described above.
The main stream of the gas flows along the outer surface of the upper incandescent cylinder 8VC, so the incandescent brightness is good and the width is uniform.
I can do S. ! The sieve υ1 gas flow is already secondary combustion'! Since it is 1J1 gas that has finished combustion, it will not emit carbon monoxide or odor even if the gas altitude decreases.

As is clear from the above description, the combustor of the present invention has the following features: providing secondary air 1''+ between the inner flame cylinder and the heating cylinder;
In order to make the opening of the unit surface of the upper red-hot surface 1'l smaller than that of the red-hot cylinder, the upper red-hot cylinder is heated with the combustion exhaust gas of the secondary combustion. - to
The heat area is large and the radiation efficiency is high. 0 ■ The red-hot temperature of the L part red-hot tube is uniform.

■ The 1" insertion area is wide, so the incandescent area is wide and the radiation efficiency is high.

The efficiency of 7L is f2).

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of the main part of a conventional example, and FIG. 2 is a 1-meter view of the main part of an embodiment of the Kinei J. 2... Inner flame tube, 3... Outer flame tube, 4...
・Upper glowing tube, 5...Joint, 6...Metal outer tube, 8...Door part glowing tube, 10...2
Next Air 1”. Name of agent Benyo! Toshio Nakao and one other person Figure 1 ρ Figure 2

Claims (1)

[Claims] An inner flame tube and an outer flame tube each having a large number of holes, and a metal outer tube are positioned concentrically from the inside to the outside. A lower incandescent plate made of wire mesh, punched metal, lath, etc. is provided on the upper part of the flame tube, an upper incandescent surface is provided at the upper part of the inner flame plate through all the secondary air ports, and an aperture ratio per unit area of the upper incandescent tube is provided. A combustor in which the aperture ratio per unit area of the external glowing tube is smaller than that of the external glowing tube.