JPS60200010A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To enlarge an adjusting range of a quantity of combustion, by providing voids having a larger distance among the voids than each of the distances among the voids in the longitudinal direction in each of void groups between one side void group and the other void group of an internal and external flame cylinders. CONSTITUTION:As for an internal and external flame cylinders 4, 5, a void group 8c having a distance Z among voids in the longitudinal direction, which is larger than those X, Y of each of void groups 8a, 8b, is provided between the void group 8a at the lowest part of the internal and external flame cylinders 4, 5 in the vicinity of a vaporization part 14a and the other void group 8b of the upper part of the vaporization part 14a. With this construction, soot, a foul odor and carbon monoxide can be prevented from generating by controlling surplus flame rise along with expansion of an adjusting range to a small quantity of combustion through control of a temperature rise close to the vaporization part of a wick at a low wick height at the time of adjusting of the quantity of combustion.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a wick vaporization type liquid fuel combustion device used in oil stoves, oil stoves, and the like.

Conventional Structure and Problems Conventionally, in this type of liquid fuel combustion device, the liquid fuel is sucked up by the capillary action of the entire lamp wick, vaporized from the tip, and burned. The exposed height of the lamp wick (hereinafter referred to as wick height) can be adjusted by changing the height of the lamp wick. The wider the adjustment range of the combustion amount, the more comfortable and convenient it is for the user, but in reality, none of them are fully satisfactory.If you try to reduce the combustion amount by lowering the wick height, the combustion position in the combustion chamber will change. Moving downward, the temperature near the vaporization part of the wick increased, and the combustion amount did not decrease significantly compared to the rate at which the wick height was lowered. In addition, when the wick height is suddenly changed from a small combustion amount to a large combustion amount (from a low wick height to a high wick height), the amount of fuel vaporized increases rapidly because the area near the vaporization part of the wick is aging. Excessive flame noise that extends outside the top of the combustion tube occurs. This excessive flame is a yellow flame that generates a large amount of soot, odor, and carbon monoxide, and the fire may protrude beyond the exterior of the device, causing burns and burns during use.
There was a delay due to safety concerns such as flames.

OBJECT OF THE INVENTION The present invention solves the problems of the conventional art by widening the combustion amount adjustment range, completely suppressing the excessive standing flame that occurs when the combustion amount is changed from a small combustion amount to a large combustion amount, and The purpose of the present invention is to provide a liquid fuel combustion device that prevents the generation of soot, odor, carbon monoxide, etc., and is superior in safety and comfort.

Structure of the Invention In order to achieve the above object, the present invention provides a group of air holes in the lowermost part of at least one of the inner and outer flame tubes in the vicinity of the vaporization part of the lamp wick exposed in the combustion IR chamber of the combustion tube and the other. By providing a bulging hole section between the air hole groups and having a distance between the air holes in the vertical direction that is larger than the distance between the air holes in the vertical direction in each air hole group, a low core height can be achieved when adjusting the combustion amount. By suppressing the temperature rise near the vaporization part of the wick, the range of adjustment to a small combustion amount can be expanded. Even when there is a sudden change from a small combustion amount to a large combustion amount, there is no sudden increase in the amount of fuel vaporization because the vicinity of the vaporization part of the wick is not VC'fx when the combustion amount is small. It has the effect of suppressing the production of soot, odor, carbon monoxide, etc.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In the eleventh engine I, 1 is a fuel tank, 2 is a heat shield plate installed on the fuel tank 1, and 3 is a combustion tube installed above the heat shield plate 2. Figure 2 shows combustion f! '! Part A of 13
4 is an inner flame tube, 5 is an outer flame tube, and 6 is an outer flame tube; 7 is a glass tube connected to the outer tube 6. The inner flame cylinder 4 and the outer cylinder 5 have a large number of air holes 8,
Combustion is performed by supplying air to the combustion chamber 9 formed between the two.

Reference numerals 10 and 11 designate an inner core cylinder and an outer core cylinder, respectively, and the flat surfaces of their upper ends form an inner fire pan 12 and an outer fire pan 13, respectively.
All of the combustion tubes 3 mentioned above are installed. 14 is the core inner and outer cylinder 10.1
A lamp wick that is movable up and down between 14a and 14a collects scum.
', g exposed in the combustion chamber 9. The amount of combustion is adjusted by changing the exposed height of the vaporizing section 14a (the height of the core) to purple.

The inner and outer flame tubes 4.5 each have an air hole group 8a at the bottom of the inner and outer flame tubes 4, 5 near the vaporization section 14a and another air hole group 8b above near the vaporization section 14a. The distance between each air hole in the vertical direction of each air hole group 8a, 8b @X.

The diameter of each air hole in the zero air hole portion 8c provided with the air hole portion Bcf having the distance izi between the air holes in the vertical direction that is greater than Y is smaller than the diameter of each air hole in each of the air hole groups 8a and 8b. Further, the air hole group 8a at the bottom of the inner and outer flame tubes 4 and 5 is arranged in a plurality of rows in the vertical direction.

In the above configuration, in the case of a large combustion amount (high core height), the vaporization area of the vaporization section 14a is large, so the fuel gas concentration near the vaporization section 14a in the combustion chamber 9 is sufficiently large, and the temperature is low. Normally, stomatal flame is difficult to form in the vicinity of the vaporization section 9. FIG. 3 shows a case where the air holes 8cf, which are large in the vertical direction of the distance between the air holes, are not provided in the inner and outer flame tubes 4 and 5 near the vaporization part 14a, as in the conventional case. Equal distances between air holes are provided throughout the page in the direction. (Al shows the state when the combustion amount is large, and as mentioned above, the pore flame f is difficult to form near the vaporization part 14a, and the temperature is lower than 1ff11' by 1 degree.) (B) shows the state when the combustion amount is small. Since the core height is low and the vaporization area is small, the amount of vaporization from the vaporization part 14a is small.The fuel gas concentration decreases slightly and the combustion position in the combustion chamber 9 shifts to one side, so the vaporization area near the vaporization part 14a decreases slightly. To+i f becomes higher than 5i and the fuel gas concentration n approaches the flammable region even near the vaporization part 14a than VC. , is provided with air holes to supply sufficient air volume and upper air rL.
Since the 39 pores 11]J distance is easily ignited, the pore flame f is formed near the vaporization section 14a, and the temperature near the vaporization section 14a becomes higher than when the combustion amount is large. This tendency to increase the flatness increases as the core height is lowered, and there is a difference in intensity when the combustion amount is large, so even if the core height is changed to a lower value when adjusting the combustion amount, the combustion amount will not decrease significantly. When the amount of combustion is suddenly changed from a small amount of combustion to a large amount of combustion, the temperature of hot water near the vaporization section 14a has a wide range and the temperature difference from when the amount of combustion is large is large, so the amount of vaporization increases rapidly. The combustion tube 3 produces an excessive amount of vaporization than the amount of vaporization at the time of large combustion amount.
Due to the combustion capacity of the combustion tube 3, the sound of excessive flames extending outward is produced.This excessive flame is a yellow flame that generates a large amount of soot, odor, carbon monoxide, etc., and also causes flames to spread outward from the exterior of the appliance. Sometimes it would stick out.

In one embodiment of the present invention, as shown in FIG.
An air hole portion 8C having a distance between the air holes in the vertical direction that is larger than the distance between the air holes of each of the air hole groups 8a and 8b is provided near a. (5) shows the state when the combustion amount is large, and (B) shows the state when the combustion amount is small. In the air hole portion 8C, the distance Z between the air holes is larger than the distances X and Y between the air holes in each of the air hole groups 5a and 8b. Therefore, the amount of air supplied is smaller than that of each air hole group 8a+8b. ' = Also, since this is the distance between the air holes that prevents the ignition of the air holes from one air hole f, the amount of vaporization decreases and the fuel gas is Even if the temperature drops to 0 degrees and approaches the flammable range, the amount of air supplied from the air hole 8c is small and insufficient, and ignition of the air hole from above does not occur. is not formed, and the vicinity of the vaporization part 14a is cooled by the air supplied from the air hole 8c, so that the increase in flatness in the vicinity of the vaporization part 14a is slight, and the temperature difference with respect to when the combustion amount is large can be suppressed to be small. Therefore, when adjusting the combustion amount, the combustion amount becomes small following the change in the wick height to become lower, and the range of adjustment of the combustion amount can be expanded. In addition, when the combustion amount is suddenly changed from a small amount to a large amount, the vaporization section 14a
Since the temperature in the vicinity is not high and the difference in Hi degree from when the combustion amount is large is small, the amount of vaporization does not increase rapidly, and the amount of vaporization is equivalent to that when the amount of combustion is large, and the combustion tube 3 combustion capacity? There is no generation of excessive standing flames that extend over the top of the combustion cylinder, no generation of yellow flames, and no generation of soot, odor, carbon oxide, etc.

Furthermore, there is no possibility of flame protruding beyond the exterior of the device.

The diameter of each air hole in the cut air hole section 8C is 8a+8 for each air hole group.
By providing the diameter of each air hole smaller than the diameter of each air hole b, the above effects can be further enhanced. Next, the lowest air hole group 8a will be described. The air hole group 8a at the bottom is important for ensuring the full rated combustion amount and for obtaining a high-quality combustion state during the startup transition period from ignition to steady combustion.
If the amount of air supplied from the air hole 8a at the bottom is insufficient, the rated combustion amount may be insufficient, or the ignition and start-up transition periods may take a long time, resulting in a large amount of soot, odor, and carbon monoxide. Therefore, in the present invention, the lowermost air hole group 8a is arranged in plural rows in the vertical direction to supply the optimum total amount of air and obtain a high-quality combustion inside. In this embodiment, both the inner and outer flame tubes 4 and 5 have a large distance between the air holes in the vertical direction. The case where air holes 18f3ck are provided will be described, and the same effect can be obtained even if \ξ is either one.

Effects of the Invention As described above, according to the present invention, by suppressing the increase in lagoon temperature near the vaporization part of the wick at a small combustion amount (low wick height) K when adjusting the combustion amount, it is possible to adjust toward a low wick height. This results in a small combustion amount, making it possible to widen the range of adjustment to the small combustion amount.

Next, even when there is a sudden change from a small combustion amount to a large combustion amount, the temperature near the vaporization part at the time of a small combustion amount is relatively low, and the temperature difference from when the combustion amount is large is small, so the amount of vaporization increases rapidly. The noise does not increase, and no excessive flame noise is generated.

The generation of yellow flame, soot, odor, carbon monoxide, etc. due to the generation of excessive standing flames is practically eliminated, the range of combustion amount adjustment is expanded, and excellent safety and comfort are achieved.

[Brief explanation of drawings]

Fig. 1 is a cutaway front view of the main parts of an embodiment of the liquid fuel combustion device of the present invention, Fig. 2 is an enlarged sectional view of the main parts, Figs. 3 (8) and (B), and Fig. 4 , (B) are respectively explanatory views of the operation of the apparatus of the present invention. 1...1 tank of fuel, 2...heat shield plate, 3...
... Combustion cylinder, 4 ... Inner flame cylinder, 5 ...
・Outer flame cylinder, 6... Outer cylinder, 8... Many air holes, 8a... Bottom group of air holes, 8b...
・・Other air hole group near the vaporization part, 8C・・・・・
Large vertical air hole passage @ air hole section with grapes, 9...
... Combustion chamber, 14... Lamp wick, 14a... Vaporization section, f... Vaporization section. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
Figure 3 (C2 Figure 4 (A)

Claims (3)

[Claims] (1) A combustion tube consisting of an inner flame tube and an outer flame tube each having a large number of air holes, and a combustion tube arranged approximately concentrically outward from the entire wall of the outer tube, and a vaporizing section arranged between the inner and outer flames of the combustion tube A lamp wick exposed in the combustion chamber formed by the cylinders, a group of air holes at the bottom of at least one of the inner flame tube and the outer flame tube in the vicinity of the vaporizing section, and other air holes Ji-Y. A liquid fuel combustion device provided with an air hole portion having a distance between the air holes in the vertical direction that is longer than the distance between each air hole in the vertical direction in each air hole group. (2) The liquid fuel combustion device according to claim 1, wherein the air hole diameter of the air hole portion having a large distance between air holes in the vertical direction is smaller than the diameter of each air hole of each air hole group. (3) The liquid fuel combustion device according to claim 1 or 2, wherein the air hole arrangement of the lowermost air hole group of at least one of the inner flame tube and the outer flame tube is provided in a plurality of rows in the vertical direction. .