JP4022486B2 - Open oil combustor - Google Patents

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a structure for taking in secondary air in an open type oil combustor for burning liquid fuel.
[0002]
[Prior art]
An open-type oil combustor is used not only in a room but also in a place where outdoor wind passes, and therefore, it is required to be a device that can be used safely in such an environment.
[0003]
Therefore, as shown in FIG. 4, this type of open-type oil combustor is an electromagnetic pump 44 that pumps the liquid fuel in the fixed tank 41 into the storage chamber 43 surrounded by the fixed tank 41 and the frame body 42 that store the liquid fuel. In addition, electrical components such as a vaporizer 45 and a control board 46 for heating and vaporizing the liquid fuel are built in, and the frame body 42 has an upper opening 47, and a partition plate 48 is provided so as to close the upper opening 47. The premixing pipe 50 and the crater 51 constituting the burner 49 for burning the vaporized gas by the partition plate 48 are arranged inside and outside the storage chamber 43, respectively.
[0004]
Thus, since the electrical components such as the control board 46 are housed in the storage chamber 43, the high-temperature combustion exhaust gas generated by the combustion due to the blowing of wind flows into the storage chamber 43 and the internal temperature is increased. If the temperature rises abnormally, the operation of the electrical components is affected, and further, the malfunction that the operation of the equipment becomes impossible due to the damage due to the heat occurs. However, with the configuration in which the partition plate 48 is provided as described above, since the partition plate 48 blocks the upper opening 47, the combustion exhaust gas does not flow into the storage chamber 43 and the internal temperature rises abnormally. It is preventing.
[0005]
The secondary air necessary for combustion avoids the flame base that is the hottest from the secondary air passage 52 formed at the periphery of the upper opening 47 so as to surround the crater 51 as indicated by the arrow in the figure. Since it is supplied to a position higher than the flame base, generation of NOx can be suppressed.
[0006]
[Patent Document 1]
Japanese Patent Laid-Open No. 10-227460
[Problems to be solved by the invention]
However, when the combustion continues, the partition plate provided near the combustion flame is heated to a high temperature. And since the heated partition plate releases heat into the storage chamber, the temperature of the storage chamber gradually rises, and even if the combustion exhaust gas does not flow into the storage chamber, the temperature of the storage chamber becomes high. It had an adverse effect on the operation of electrical components.
[0008]
Therefore, in order to lower the temperature in the storage chamber, a structure for cooling the heated partition plate is required, but the secondary air introduced from outside the main body passes through a secondary air passage provided separately from the partition plate. In the conventional structure, the partition plate cannot be cooled by the secondary air.
[0009]
An object of the present invention is to solve the above-mentioned problems, and an object of the present invention is to provide an open-type oil combustor that suppresses a temperature increase in a storage chamber to prevent a decrease in performance of electrical components and maintains good combustion.
[0010]
[Means for Solving the Problems]
The invention according to claim 1 is a fixed tank for storing liquid fuel, a frame placed on the fixed tank, a storage chamber formed by the fixed tank and the frame, and containing an electrical component therein, An upper opening provided in the frame, a burner including a premixing tube, a crater, and a flame hole, and a secondary air passage formed between the upper plate and the lower plate provided in the upper opening to form secondary air in the burner A secondary air intake port is provided on the entire periphery of the upper plate of the partition plate, and the secondary air intake port is connected to the peripheral portion of the notch through which the frame rod and the ignition heater pass. It is an open type oil combustor characterized by being provided more than the part .
[0011]
That is, in the first aspect of the invention, the partition plate prevents the combustion exhaust gas from flowing into the storage chamber, and more secondary air is present in the peripheral portion of the cutout portion through which the frame rod and the ignition heater pass than other portions. Since the intake port is provided, damage to the insulator due to heat can be prevented by taking in a lot of secondary air into the insulator of the ignition heater and cooling it. Further, since the secondary air passage is formed by the partition plate, the secondary air taken from the outside is immediately used for cooling the partition plate that has become hot due to combustion, and the partition plate is effectively used. Cool to prevent temperature rise in the storage chamber.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, a combustor according to an embodiment of the present invention will be described with reference to the accompanying drawings.
[0017]
FIG. 1 is a cross-sectional view of an open-type oil combustor, in which liquid in a fixed tank 1 is stored in a storage tank 3 surrounded by a fixed tank 1 for storing liquid fuel and a frame 2 placed on the fixed tank 1. Electrical components such as an electromagnetic pump 4 that pumps fuel, a vaporizer 5 that heats liquid fuel to vaporize, and a control board 6 are built in. Further, the frame body 2 has a vent 7 for taking in primary air on the side surface and an upper opening 8 on the upper surface, and a partition plate 9 is provided so as to close the upper opening 8.
[0018]
And as shown in FIG. 2, the burner 10 which burns liquid fuel mixes the vaporization gas vaporized by the vaporizer | carburetor 5, and the primary air taken in from the vent hole 7, and makes the premixed gas 11 into a premixed gas, It comprises a crater 13 having a flame hole portion 12 through which premixed gas is ejected, and a cylindrical rectifying plate 14 provided in the crater 13, and the premixing tube 11 and the crater 13 are respectively connected via a partition plate 9. It is arranged inside and outside the storage chamber 3. The crater 13 has a substantially conical shape having an inclined surface, and a net forming the flame hole portion 12 is attached to the inclined surface by spot welding. Further, around the crater 13, there are provided a flame rod 15 for detecting ignition and combustion state, an ignition heater 16 for igniting the premixed gas ejected from the flame hole portion 12, and a flame holding plate 17.
[0019]
Further, as shown in FIG. 3, the partition plate 9 is composed of a disc-shaped upper plate 18 and a lower plate 19 each having a bend, and the outer peripheries of the upper plate 18 and the lower plate 19 are made by means of caulking or the like. It is fixed. A space formed between the upper plate 18 and the lower plate 19 serves as a secondary air passage 20 that supplies secondary air for combustion to the burner 10, and the upper plate 18 takes in secondary air. A plurality of air intakes 21 are provided, and a notch 22 through which the frame rod 15 and the ignition heater 16 pass is provided.
[0020]
In addition, a reflecting plate 23 and a drift plate 24 are provided on the outer periphery of the partition plate 9, and the reflecting plate 23 has a first inlet 25 for taking outside air into the main body on the side surface. The air taken into the main body from the inlet 25 passes through the second inlet 26 provided in the drift plate 24 and the secondary air provided in the upper plate 18 of the partition plate 9 as shown by the arrow in FIG. It flows into the intake 21 and is supplied to the burner 10 through the secondary air passage 20. The air outlet 27 of the secondary air passage 20 communicates with the flame holding plate 17 and opens at a position lower than the flame hole portion 12 of the burner 10.
[0021]
The positions of the secondary air intakes 21 provided on the upper plate 18 of the partition plate 9 are not uniform over the entire circumference, and there are other parts around the notch 22 through which the frame rod 15 and the ignition heater 16 penetrate. More secondary air intakes 21 are provided. This is because the insulator (not shown) that covers the base of the ignition heater 16 is vulnerable to heat, so that more secondary air is taken in and cooled in this portion to prevent damage to the insulator due to heat. Because.
[0022]
The upper part of the frame 2 is provided with a radiating cylinder 28 provided with a large number of openings, a red-hot cylinder 29 that hangs down from the vicinity of the upper end of the radiating cylinder 28 and is red hot when exposed to a combustion flame, A warm air fan 30 for diffusing warm air is provided.
[0023]
Next, the operation of the open type oil combustor configured as described above will be described. When an operation switch (not shown) is operated, heating of the vaporizer 5 is first started. When the vaporizer 5 rises to a temperature sufficient to heat and vaporize the liquid fuel, the electromagnetic pump 4 operates to pump up the liquid fuel stored in the fixed tank 1 and supply the pumped liquid fuel to the vaporizer 5. Is done.
[0024]
The liquid fuel supplied to the vaporizer 5 is heated and vaporized to become a vaporized gas, and is ejected to the premixing tube 11. At this time, ambient air is also drawn into the premixing tube 11 as primary air, and the vaporized gas and the primary air are discharged. Is premixed and becomes a premixed gas. When the premixed gas flows into the crater 13 through the rectifying plate 14, the premixed gas is turned downward at the upper end of the rectifying plate 14 and ejected from the flame hole portion 12 provided on the inclined surface of the crater 13. Is ignited by and starts combustion.
[0025]
When it is detected that the frame rod 15 has ignited, the warm air fan 30 is started. Further, the red hot cylinder 29 is heated by the flame to become red hot and radiates radiant heat, and the hot air flowing out from the heat radiating cylinder 28 is mixed with the air blown from the hot air fan 30 and becomes hot air and diffuses in the entire circumferential direction. .
[0026]
It is not uncommon for such a combustor to be used in a place where outdoor wind passes. When the wind is received during combustion, a large amount of hot air flows back into the housing chamber 3 from the gap around the burner 10. Sometimes. Then, the temperature in the storage chamber 3 rises, which adversely affects the operation of many electrical components housed therein, or in the worst case, damages the electrical components and makes it impossible to operate the equipment. . Therefore, by providing a partition plate 9 so as to close the upper opening 8, hot air is prevented from flowing into the storage chamber 3.
[0027]
Further, when dust or the like accumulates in the vent hole 7 and becomes blocked, it becomes difficult to take in the primary air from the vent hole 7, so that hot air flows backward to take in air from the gap around the burner 10. However, also at this time, the partition plate 9 prevents the backflow of hot air.
[0028]
In addition, the partition plate 9 prevents the inflow into the storage chamber 3 even when water is poured or when fuel is accidentally spilled during fuel supply.
[0029]
And with respect to the flame formed in the flame hole part 12, secondary air is supplied from the blower outlet 27 through the secondary air passage 20, and complete combustion is carried out. Since the flame hole portion 12 is provided on the inclined surface of the crater 13, the flame is blown obliquely upward without spreading sideways. Therefore, the distance between the flame holding plate 17 provided around the burner 10 and the flame. Becomes wider, and deterioration of the flame holding plate 17 due to heat is suppressed, so that durability is increased. In addition, since the spread of the flame to the side becomes small, the combustor can be made compact.
[0030]
Moreover, although the partition plate 9 is heated by the radiant heat from the flame, the secondary air cools the partition plate 9 while passing through the secondary air passage 20 formed by the upper plate 18 and the lower plate 19 of the partition plate 9. Therefore, it is possible to prevent the partition plate 9 from being heated to increase the temperature of the storage chamber 3 and adversely affect the operation of the electrical component. Further, since the air outlet 27 of the secondary air passage 20 is opened at a position lower than the flame hole portion 12 of the burner 10, the secondary air does not directly hit the base flame portion of the flame having the highest temperature, so NOx is not generated. There is no fear that it will occur in large quantities.
[0031]
【The invention's effect】
As described above, according to the first aspect of the present invention, the partition plate prevents the combustion exhaust gas from flowing into the storage chamber, and the peripheral portion of the cutout portion through which the frame rod and the ignition heater pass is another portion. Since more secondary air intakes are provided, damage to the insulator due to heat can be prevented by taking in more secondary air into the insulator of the ignition heater and cooling it. Further, since the secondary air passage is formed by the partition plate, the secondary air taken in from the outside is immediately used for cooling the partition plate that has become hot due to combustion. Cooling. Therefore, it is possible to prevent the temperature in the storage chamber from rising abnormally and maintain good combustion.
[Brief description of the drawings]
FIG. 1 is an external view of an embodiment of the present invention.
FIG. 2 is a cross-sectional view of a burner according to an embodiment of the present invention.
FIG. 3 is a diagram of a partition plate according to an embodiment of the present invention.
FIG. 4 is a diagram of a conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Fixed tank 2 Frame 3 Storage chamber 8 Upper opening 11 Premixing pipe 13 Tinder 12 Flame hole part 10 Burner 20 Secondary air passage 9 Partition plate

Claims (1)

A fixed tank for storing liquid fuel; a frame body mounted on the fixed tank; a storage chamber formed by the fixed tank and the frame body for accommodating electrical components therein; and an upper portion provided in the frame body A burner comprising an opening, a premixing tube, a crater and a flame hole, and a partition plate provided in the upper opening to form a secondary air passage between an upper plate and a lower plate and supplying secondary air to the burner A secondary air intake is provided on the entire periphery of the upper plate of the partition plate, and the secondary air intake is provided more in the peripheral part of the notch through which the frame rod and the ignition heater pass than other parts. Open type oil combustor.

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