JPS58182009A - Burner for liquid fuel - Google Patents

Abstract

PURPOSE:To perfectly terminate combustion without producing lifting and a leaping motion of a flame and to enable the reduction in an offensive smell of CO in exhaust gas and unburning gas, by a method wherein a pipe communicating with the atmosphere is installed and a means for opening and closing the pipe is mounted in a secondary combustion chamber. CONSTITUTION:A pipe 12 communicating with a secondary combustion chamber 9 and the atmosphere is installed passing through an inner flame cylinder 6 and an outer cylinder 3, and a damper 13 for varying a sectional area is mounted in the inlet of the pipe 12. The pipe 12 for intercommunicating the secondary combustion chamber 9 and the atmosphere is communicated therebetween through the opening of the damper 13, the air flows in the secondary combustion chamber 9 after passing through the pipe 12, and thereby, a quantity of the air flowing in and a pressure (a negative pressure) in the secondary combustion chamber 9 are lowered as a result of the control of a thermal draft effect by means of a cooling. Since the pressure in the secondary combustion chamber 9 and a pressure in a primary combustion chamber 8 react to each other, with the damper 13 being opened, a combustion volume decreases, and with the damper 13 being opened, a combustion volume decreases, and with the damper 13 being closed, the combustion volume increases.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device used for home heating, cooking, etc., and is intended to expand the variable width of the twisting lid. Conventionally, the wick-type fuel combustion device used in kerosene stoves, etc. is less noisy and easy to configure.
Although it is easy to handle and operate, the variable range for achieving good combustion is narrow. Do you want to change your face?
Alternatively, there is a method of varying the amount of air entering near the wick <I/CtR, and changing the temperature and fuel vapor pressure, which are the conditions for fuel evaporation. Using these methods, the combustion amount was 14. %, but it was difficult to maintain a good combustion state. In other words, when the amount of combustion is reduced, the combustion speed slows down as the fuel gas becomes leaner, and the flame lifts or moves, making the secondary flame front unstable. As a result, some parts of the combustion are not completely finished, and some parts of the flame remain unfinished. As a result, an extremely large amount of CO and odors are generated, resulting in
For practical reasons, the variable range of combustion amount was limited to about 10 to 30 inches.

Therefore, the present invention provides a secondary combustion chamber above the secondary combustion chamber, a pipe communicating with the atmosphere is housed in the secondary combustion chamber, and a means for opening and closing this pipe is provided. The draft of the secondary combustion chamber can be varied per kilometer by the air flowing in from the combustion chamber. Therefore-
The draft in the combustion chamber changes in conjunction with the shift in the secondary combustion chamber, and the amount of combustion changes. Since the air flowing in from the pipe is discharged without imparting combustion VC, even if the combustion amount changes, there is little change in the fuel gas concentration, so combustion is completely terminated without causing flame lifting or mii. This makes it possible to completely reduce CO odor and unburned gas in exhaust gas.

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

The cylindrical lamp wick 1 shown in the figure is installed so as to be submerged in the lower fuel 2 and move up and down as a guide for the inner cylinder 3 and the inner cylinder 4 (5 operating mechanisms are not shown). A primary combustion chamber 8 is formed between an inner flame tube 6 and an outer flame tube 7 having porous holes 5 in the upper part of the lamp wick 1, and a secondary combustion chamber 9 is further formed in the upper part of the secondary combustion chamber 8. . The red heat m1o of the upper part of the outer flame tube 7 and the secondary combustion chamber 9 is made of a material with a high opening type such as a lath mesh or a punched phase, and its outer periphery is connected to the outside air by a transparent tube 11. Pipe 12 that communicates the secondary combustion chamber 9 with the atmosphere
is the inner flame cylinder 6. It is provided all the way through the inner cylinder 3, and the upper 6α
A damper 13 whose total area is variable is provided between the entrances of the pipes 12.

Next, the operation will be explained. The lamp wick 1 is raised and exposed to the primary combustion chamber 8. The fuel 2 passes through the wick 1 and is sucked up by the bristle 1'l of urine at its tip.

When the ignition heater (not shown) is passed through, the upper end of the lamp wick 1, which is sufficiently soaked with fuel, is ignited and combustion begins. The high temperature gas generated by firing generates an upward current due to a thermal draft from the iodine firing chamber 8 to the secondary combustion chamber 9, and - air flows into the iodine firing chamber 8 from the hole 5. and hole 5
Each lamp holds its flame and pore combustion takes place completely, and the evaporation of the fuel from the wick 1 is promoted by the radiation of the combustion heat. - A mixed gas of fuel 1 and air is sucked from the iodine firing chamber 8 to the secondary combustion chamber 9, but the air flowing into the primary combustion chamber 8 A secondary flame is fully formed at the upper end of the flame, and in this state the flame is stable and good combustion occurs. - The evaporation layer of the fuel in the iodine combustion chamber 8V (the inflowing moss plate) both depend on the specifications of the primary combustion chamber 8, but are roughly compared to the square root of the pressure (negative pressure) of the primary combustion chamber 8. - The amount of combustion changes according to the change in the pressure of the iodine firing chamber 8 while keeping the ratio of fuel and air constant.Changes in the amount of combustion are greatly influenced by the diameter and position of the hole 5,
The smaller the diameter and the further away from the wick 1, the greater the change in the amount of combustion relative to the pressure in the iodine firing chamber 8. Furthermore, the amount of inflow air is related to the total area of the holes, and the degree of change becomes larger as the diameter becomes smaller (the larger the number of holes) within the same area. As described above, since the combustion amount changes without changing the air-fuel ratio in response to changes in the pressure in the primary combustion chamber 8, flame holding of the secondary flame is stabilized, and excellent combustion can be performed. Next, when the damper 13 of the pipe 12 that communicates the secondary combustion chamber 9 with the atmosphere is opened, air flows through the pipe 12 into the secondary combustion chamber 9, and as a result,
Due to the amount of air flowing in and cooling, the effect of the hot drum 71 is suppressed, and the pressure (negative pressure) in the secondary combustion chamber 9 is reduced.

Since the pressure in the secondary combustion chamber 9 and the pressure in the iodine combustion chamber 8 have a speed ratio, when the damper 13 is opened, the combustion needle becomes small, and when the damper 13 is closed, the combustion liquid becomes small. 61, ta, amount of air flowing in from pipe 12, trat vc, r
Since it rises, it is emitted without taking part in combustion. Therefore, combustion can be performed stably. In the IQ-1fl, a transparent tube 11 was provided with a part of the outer flame tube A and a part of the incandescent tube 10i with a high aperture ratio.
The upper part of the transparent cylinder 11 and the red-hot cylinder 10 are made red-hot by burning moxibustion and high-temperature gas after combustion, and the entire transparent cylinder 11 can be seen through and radiated. In the case of the suspended non-implemented case υ, a configuration was shown in which air is allowed to flow in from the upper part of the inner flame part 6, but if it is possible to flow in any position in the secondary combustion chamber 9 and no radiation is required, the air can be introduced from the outside of the outer flame tube 7. If you let the water flow in from the ground, you can see the effect because it can reach all the people in the inflow area. As described above, according to the present invention, the secondary combustion chamber provided above the primary combustion chamber has all stages of pipes communicating with the atmosphere, and means for opening and closing these pipes are provided, so that the pressure in the primary combustion chamber can be varied. , it is possible to perform good combustion in response to changes in combustion amount without producing secondary flames. -1: Exhaust from the secondary combustion chamber 9 ``Opening 1 of 1'' It was difficult to maintain mechanical reliability and accuracy at the Takahoro exhaust section in the case where the area metal was variable and the maximum combustion pressure was fully controlled. In this respect, the present embodiment has a simple configuration and the rotating part (damper 13) is located at a low critical position, so that the accuracy and reliability are basically high.

Further, even if the pipe 12 is blocked, the damper 13 is stuck, etc., the combustion amount changes within a variable range, and abnormalities such as the establishment of a fire or the generation of unburned gas do not occur.

In addition, a means for detecting the entire temperature such as bimetal and a damper 13'
ff: By interlocking, it becomes possible to automatically control the combustion amount according to the load.

[Brief explanation of the drawing]

The figure is a sectional view showing one embodiment of the present invention. 1...Lamp wick, 6...Inner flame tube, completed...
・Outer flame cylinder, 8...-Iodine firing chamber, 9...Secondary combustion chamber, 12----Pipe, 13Ne... Damper.

Claims (2)

[Claims] (1) The n-th combustion chamber is formed between the inner and outer flame tubes having porous holes, the wick whose tip is located in the above-mentioned combustion chamber, and the upper part of the above-mentioned second combustion chamber during combustion. A liquid fuel combustion apparatus, which is completely equipped with a secondary combustion chamber provided in contact with the can, is provided with a pipe that connects the secondary combustion chamber to the atmosphere, and is provided with means for opening and closing this pipe. (2) The plate fuel combustion device according to claim 1, wherein the means for detecting the entire room temperature and the means for opening and closing the pipe are linked.