JPS5912216A - Kerosene burner - Google Patents

Abstract

PURPOSE:To improve a radiation efficiency, by a method wherein a kerosene burner is concentrically provided with an inner flame cylinder having a heating-to-red auxiliary cylinder, wherein a number of pores are formed, and an upper heating-to-red cylinder, and a metallic outer cylinder equipped with an outer flame cylinder having a lower heating-to-red cylinder such as wire nettings and an optical transmissive outer cylinder. CONSTITUTION:An upper heating-to-red cylinder 8 is mounted through the medium of a secondary air port 12 to the upper part of an inner flame cylinder 2 provided at the inside thereof with a cylindrical heating-to-red auxiliary cylinder 11 having a number of pores. A burner is constituted such that it is concentrically disposed togetherwith an outer flame cylinder 3, provided at the upper part thereof with a lower heating-to-red cylinder 4 comprising wire netting, a punched metal, a lath, etc. and a metallic outer cylinder 6 provided at the upper part thereof with an optical transmissive outer cylinder 5 such as glass. Further, installation of a secondary air port 12 and a heating-to- red auxiliary cylinder 11 enables widening of a heating-to-red range with the upper heat-to-red cylinder 8 heated-to-red by the combustion waste gas of secondary combustion, the improvement of the radiation efficiency by obtaining the radiant heat from the heating-to-red auxiliary cylinder, and an increase in uniformity of a heating-to-red temperature.

Description

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

A combustion chamber is formed by an inner flame tube and an outer flame tube with many small holes, and the high-temperature gas flow heats a red-hot body such as wire mesh, punched metal, lath, etc. to red-hot temperature.The combustor is used for home heating such as portaple oil stoves. It has many advantages, such as not requiring a power source, being small and lightweight, making it easy to move, less likely to break down, and being comfortable with radiant heating, making it the mainstream heater for home use.

Conventionally, this type of combustion tube has the configuration shown in FIG. 1 in many cases. In other words, 1 is a lamp wick whose lower end is omitted in the figure, but it is soaked in the fuel in the fuel tank provided at the bottom, and the upper end is exposed in the combustion chamber. 02 is an inner flame tube with many small holes. , 3 is an outer flame cylinder having a large number of small holes, and a combustion chamber is formed in the gap between the outer flame cylinder and the inner flame cylinder. Reference numeral 4 is a red-hot tube that is connected to the outer flame tube 3 and is made of lath, punched metal, wire mesh, etc. and has an aperture ratio larger than that of the outer flame tube; 6 is an outer tube made of a heat-resistant light-transmitting material such as glass; 7 is a metal outer cylinder that holds the outer cylinder 5; 7 is an upper lid connected to -F of the inner flame cylinder 2 and has an air hole; 8 is a hot flame plate fixed to the upper lid 7.

In the above configuration, in a steady combustion state, the fuel gas vaporized from the tip of the lamp wick 1, the inner flame tube 2, the outer flame tube 3. The air mixed with the air supplied from the small holes and openings of the incandescent tube 4 by the natural 3-fludraft and partially combusted is supplied from the air hole of the final upper cover 7 (2-fire air).
complete combustion. In this type of combustion method, the air supply (primary air) up to the secondary combustion position (the position where secondary air is supplied) is in a very fractional state (because it is supplied from small holes in the inner and outer flame cylinders). ), the lower part of the combustion chamber has a large amount of unburned gas, and the higher it goes to the upper part, the thinner the unburned gas, making complete combustion difficult. Therefore, a method has been used in which air is supplied intensively to achieve complete combustion while leaving a suitable amount of unburned gas components. However, this method has the disadvantage that the combustion heat obtained by secondary combustion does not contribute to the red heat of the glowing cylinder, so the ratio of radiant energy to fuel consumption is low and radiation efficiency is poor, and the exposed height of the wick is low. Even if you feel the amount of fuel vaporized, the flame in the secondary combustion section will only decrease, and there will be almost no change in the red-hot state of the incandescent tube. In addition, the exposed height of the wick was lowered, resulting in poor combustion due to excess air, which resulted in the production of carbon monoxide and odors.

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

In order to achieve this object, the present invention provides a cylindrical "partly red-hot cylinder" above the secondary combustion part (secondary air supply part) and an auxiliary red-hot cylinder with many small holes inside the cylinder. The configuration is as follows.

In this configuration, during steady combustion, the high-temperature waste gas and part of the combustion flame burned in the secondary combustion section heat the upper glowing cylinder as they rise while contacting the upper glowing cylinder, but the auxiliary glowing cylinder causes resistance inside the glowing cylinder. Because of this, the high temperature waste gas stream flows inward through the opening of the upper glowing cylinder in a small amount, and rises along the outer surface of the upper glowing cylinder, causing the two-part glowing cylinder to glow evenly.

In addition, some of the high-temperature waste gas heats the red-hot auxiliary cylinder, and radiant heat can also be obtained from the red-hot auxiliary cylinder.

If there is no incandescent auxiliary tube in each of the five bases, due to the nature of high-temperature waste gas, the gas will concentrate in the center, so only the lower part of the upper incandescent tube will be red-hot, and the upper part will be in a state where the red-hot temperature is extremely low. .

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

In Figure 2, 1 is omitted in the figure, but the lower end is soaked in the fuel tank provided at the bottom, and the upper part is exposed in the combustion chamber. 2 is the inner flame cylinder with many small holes. , 3 is an outer flame tube having a large number of small holes, 4 is a lower incandescent tube made of lath, punched metal, wire mesh, etc. and is connected to the outer flame tube 3, and 6 is made of a heat-resistant light-transmitting material such as glass. The outer cylinder 6 is a metal outer cylinder that holds the outer cylinder 6, and the inner flame cylinder 2. Outer flame tube 3. The metal outer cylinder 6 is held substantially concentrically by cross pins or the like. Reference numeral 7 denotes a separator plate connected to the inner flame cylinder 2, 8 an upper glowing cylinder made of lath, punched metal, wire mesh, etc., and 9 a top lid for holding the upper glowing cylinder 8, which has an air opening of 1°. Reference numeral 11 indicates a red-hot auxiliary tube having a large number of small holes, and 12 indicates six air ports (secondary air ports) provided between the inner flame tube 2 and the upper glow tube 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 flow supplied by natural draft from the small hole at the bottom of the outer flame tube 3,
Inner flame tube 2. It burns while mixing with air supplied from all the small holes of the outer flame cylinder 3 and the opening of the lower glowing cylinder 4.

In the primary combustion chamber 13 formed by the gap between the lower glowing tube 4 and the inner flame tube 2, the lower glowing tube 4 is made red hot in the combustion chamber, and the remaining unburnt gas is mixed with air supplied from the final secondary air port 12. The mixture is completely combusted, and the high-temperature waste gas is sent to the upper red-hot cylinder 8.
[The air is discharged to the outside from the rising air port 10 and the upper opening of the upper glowing cylinder 8.]

The high-temperature waste gas that has been completely combusted at this time has the property of converging in the center and tries to flow toward the center from the lower part of the upper glowing cylinder 8, but by providing the red-hot auxiliary cylinder 11, the resistance in the central direction increases. Therefore, the main flow rises along the outer surface of the upper glowing cylinder 8, and a part of the flow flows into the inside through the opening of the upper glowing cylinder 8) and is exhausted to the outside from the air 110. The flow makes the upper glowing tube 8 red hot in the process of rising, but as mentioned above, since the main stream of high-temperature waste gas flows along the outer surface of the upper glowing tube 8, the red glow brightness is high and a uniform temperature can be obtained.

1) Part of the high-temperature waste gas that flows toward the center from the opening of the upper glowing tube 8 heats the red-hot auxiliary tube, so the temperature of the auxiliary tube increases and radiant heat can be obtained.〇There is no red-hot auxiliary tube. Although a cylinder with holes is effective, the pressure loss that occurs between the upper glowing cylinder and the auxiliary glowing cylinder becomes severe, and the high-temperature waste gas flow rises a little further away from the outer surface of the glowing cylinder, lowering the glowing temperature. In addition, by providing a large number of small holes in the red-hot auxiliary cylinder and discharging some of the waste gas from the small holes to the opening in the second part of the red-hot auxiliary cylinder, the pressure loss between the upper red-hot cylinder and the red-hot auxiliary cylinder can be adjusted appropriately. It is possible to increase the red-hot temperature by bringing the main stream of high-temperature waste gas closer to the outer surface of the upper red-hot cylinder.

Furthermore, since the high-temperature waste gas stream has already been burned through secondary combustion, it does not generate carbon monoxide or odor even if it comes into contact with the two-part glowing cylinder and the gas temperature drops.

As is clear from the explanation below-1-, the combustor of the present invention has the following features: a secondary air port is provided between the inner flame cylinder and the two-part glowing cylinder;
By providing a cylindrical auxiliary red-hot cylinder inside the upper red-hot cylinder, (1) the combustor gas of secondary combustion heats the -L part red-hot cylinder to make it red-hot, so the red-hot area is wide and the radiation efficiency is high.

(2) The red-hot temperature of the upper red-hot tube has good uniformity.

(3) Radiation efficiency is high because radiant heat can also be obtained from the red-hot auxiliary cylinder.

The following effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional example, and FIG. 2 is a sectional view of a main part of an oil combustor showing an embodiment of the present invention. 2... Inner flame tube, 3... Outer flame tube, 4...
...Lower glowing tube, 5... Outer cylinder, 6...
...Metal outer cylinder, 8...Top glowing cylinder, 11...
...Red-hot auxiliary tube, 12...Secondary air port. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st
Figure 2

Claims (2)

[Claims] (1) An inner flame tube having many small holes, an outer flame tube and a metal outer tube are positioned concentrically, and an outer tube made of light transmitting material such as glass is placed above the metal outer tube, and an outer flame tube made of a light transmitting material such as glass is placed above the outer flame tube. A lower glowing cylinder made of wire mesh, punching metal, lath, etc., an upper glowing cylinder provided above the inner flame cylinder via a secondary air port, and a cylindrical glowing auxiliary cylinder provided inside the upper glowing cylinder. Oil burner. (2) The oil combustor according to claim 1, wherein the red-hot auxiliary cylinder is provided with small porous holes.