JPH05133519A - Device for burning petroleum - Google Patents

Abstract

PURPOSE:To provide uniformly stabilized burning flame without producing carbon monoxide, soot, and smell and obtain good burning characteristics by blowing air uniformly over the entire region of a burning port of burner head in its longitudinal direction to accelerate mixing of secondary air flow with a burning flame in a burning device wherein petroleum is used as fuel. CONSTITUTION:A secondary suction port 16 on one side of a secondary air port 17 is longer than a burner head 14 in its longitudinal direction and said port 16 is projected into an air passage between a burner case and an air flow case. As a result, secondary air can be uniformly blown over the entire region in its longitudinal direction and hence a uniformly mixed flow can be sent to a burning flame.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a petroleum-fueled combustion device used in a water heater, a heater or the like.

[0002]

2. Description of the Related Art A conventional oil combustion apparatus of this type is shown in FIGS.
Shown in. A frame-shaped burner case 11, a plurality of inverted U-shaped burner heads 14 provided inside the burner case 11 and having a flame hole 12 on the upper surface and an intake port 13 opened on the lower surface, and a burner head. Secondary air inlet 17 having a secondary inlet 16 at a side end portion and a secondary air ejection hole 15 provided on an upper surface, a primary air intake 7, a fuel injection nozzle 1, vaporizer 4 having embedded heater 2
And the suction port 13 of the burner head 14 and the lower end 9 of the carburetor 4.
It was composed of a box-shaped mixing chamber 10 having a bottom, which allows communication between and. In addition, the primary air is blown by the blower 21 to the primary air intake 7
Therefore, the secondary air is supplied from the secondary inlet 16 by the blower 21.

In the above structure, the heater 2 is energized,
When a predetermined temperature is detected by the temperature detector 5, the fuel is supplied from the nozzle 1 into the vaporizer 4 and becomes vaporized gas. On the other hand, combustion air is supplied into the vaporizer 4 from the peripheral portion of the nozzle 1 by the blower 21, and is mixed with the vaporized gas to become a premixed gas, from the lower end 9 of the vaporizer 4 to the lower part of the burner head 14 via the mixing chamber 10. Into the suction port 14 and is ejected from the flame hole 12. This premixed gas is ignited by an igniter 18 provided in the vicinity of the flame hole portion 13, and the air supplied from the blower 21 is mixed with the secondary air flow from the secondary air ejection hole 16 to be promoted to promote mixing in the burner case 11. It burns in the combustion chamber.

[0004]

However, in the conventional structure as described above, in promoting the mixing with the secondary air flow from both side surfaces of the flame hole portion 12 in the combustion of the flame hole portion 12 in the longitudinal direction of the burner head 14. , There are the following problems. The distribution of the secondary air flow sucked from the secondary suction port 16 and blown from the secondary air ejection hole 15 in the longitudinal direction of the secondary air port 17 is shown by the burner in which the secondary suction port 16 has a frame shape. Since it is located on the same surface as the case 11, the secondary air port 1
The static pressure distribution of the air blown into the secondary air port 1
Since the flow velocity in the vicinity of the secondary air inlet 16 of 7 is high, it becomes a vortex region and the pressure becomes a negative pressure, and no air is ejected from the secondary air ejection hole 15 in this portion. Therefore, since it does not contribute to promoting the mixing of the burner head 14 with the combustion flame,
In the vicinity of the burner case 11 side, good combustion does not occur, and a partially nonuniform combustion flame occurs.

The nonuniform combustion portion near the secondary air inlet 16 causes deterioration of combustion performance due to generation of carbon monoxide and soot due to insufficient mixing. Furthermore, burner head 1
In the vicinity of 4 of the flame holes 12, since the secondary air is small, combustion is formed only by the primary premixed gas, the mixing by the secondary air flow is not promoted, and a good laminar combustion flame is not obtained, and flame holding When the combustion is stopped, unburned kerosene gas comes into contact with the high temperature part and aldehydes, etc. It becomes a raw gas with a strong pungent odor and becomes a problem of odor generation.

The present invention solves the above-mentioned conventional problems, and by uniformly promoting the mixing promotion by the secondary air flow to the combustion flame over the entire area of the burner head flame hole in the longitudinal direction, The object is to obtain a good combustion characteristic with a uniform combustion flame without generation of carbon monoxide, soot and odor.

[0007]

In order to solve the above-mentioned problems, an oil combustion apparatus of the present invention is provided with a frame-shaped burner case, and the burner case is internally provided with a flame hole portion on the upper surface and a lower surface on the lower surface. A plurality of inverted U-shaped burner heads that are opened as suction ports and are alternately arranged so as to sandwich the burner heads, and a secondary air ejection hole is provided on the upper surface, and one side end is A plurality of rectangular tube-shaped secondary air ports having a secondary suction port provided at the side end portion of the burner head so as to extend beyond the end portion of the burner head and project from the burner case;
A combustion injection nozzle, a vaporizer having an embedded heater,
A bottomed box-shaped mixing chamber that connects the suction port of the burner head to the lower end of the vaporizer, and a blower case in which a blower is connected to one end that forms a blower path between the burner case and the burner case. Is.

[0008]

According to the present invention, since the flow velocity in the vicinity of the secondary suction port is high and the eddy region and the static pressure become negative pressure are projected from the burner case, the present invention is provided in the burner case. Since the static pressure from the secondary air ejection holes can be made a stable positive pressure, the mixing promotion by the secondary air flow to the combustion flame is uniformly blown over the entire longitudinal area of the burner head flame hole. It is possible to obtain a good combustion with a uniform combustion flame without generation of carbon monoxide, soot and odor.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, FIG. 2, FIG. 3, FIG. 4 and FIG.
Reference numeral 1 denotes a nozzle in which kerosene is pumped by a pump 2 and atomized by a vaporizer 4 having a heater 3 therein. Reference numeral 5 denotes a temperature detector of the vaporizer 4, which controls the energization and de-energization of the heater 3. 6 is a vaporizer lid, which has a nozzle 1 and a primary air intake 7 at the upper part. A vaporization chamber 8 is formed by the vaporizer lid 6 and the vaporizer 4. 9 is a lower end opening of the vaporizer 4, 10 is a bottomed box-shaped mixing chamber communicating with the lower end opening 9 of the vaporizer, 11 is a box-shaped burner case, inside of which is a flame hole 12
Has a plurality of inverted U-shaped burner heads 14 which are opened as suction ports 13 communicating with the mixing chamber 10 on the lower surface, and are alternately arranged so as to sandwich the burner heads 14, and secondary air is ejected on the upper surface. A hole 15 is provided with a secondary suction port 16 at one side end thereof. The secondary suction port 16 is longer than the burner head 14 in the longitudinal direction and has a plurality of rectangular tubular shapes formed so as to project from the burner case 11. A secondary air port 17 is provided. Reference numeral 18 is an igniter, and 19 is a box-shaped blower case connected to a blower 21 that forms a blower path 20 with the box-shaped burner case 11.

In the above structure, the heater 1 is energized,
When the carburetor 4 reaches a predetermined temperature and the temperature detector 5 detects it, the heater 2 is de-energized, the combustion air is blown from the blower 21, and the fuel is ejected from the nozzle 1. The injected fuel is vaporized in the vaporizer 4 to become vaporized gas, which is mixed with the primary air for combustion from the primary air intake 7 in the vaporization chamber 8 to become premixed gas, and the lower end opening 9 of the vaporizer 4 is formed. Is sent into the burner head 14 through the mixing chamber 10 and is ejected from the flame hole portion 12. The premixed gas ejected from the flame hole portion 12 is ignited by the igniter 18 and supplied from the secondary intake port 16 at one end of the secondary air port 17 and mixed with the secondary air flow from the secondary air ejection hole 15. Then, combustion is promoted and combustion flame is formed at the burner head 14.

In the formation of this combustion flame, the burner head 1 is provided with one side end of the secondary air port 17 for promoting mixing.
Since the secondary suction port 16 is provided in the air passage at the side end of the burner case 11 so as to extend beyond the end of No. 4, the flow velocity near the secondary suction port 16 is high. Since the region which becomes the eddy region and the static pressure becomes negative pressure is projected from the burner case 11, it is provided from the inside of the burner case 11.
The static pressure from the secondary air ejection hole 15 can be a stable positive pressure, and 2
It is possible to obtain uniform air blowing without a negative pressure region or the like over the entire length of the subsequent air flow in the longitudinal direction. Then, since it is uniformly mixed and promoted with the combustion flame to form a good combustion flame, it is possible to obtain one having excellent combustion characteristics.

The secondary suction port 16 of the secondary air port 17
In the secondary air port 17 of the present invention in which one end is closed and the upper secondary air ejection hole 15 is provided, the flow velocity is high and it becomes a vortex region as shown in the second embodiment in FIG. The static pressure becomes negative only in the vicinity of the air ejection hole in the upper part, and if about half or more of the dimension in the height direction is projected, the same uniform air blowing effect can be obtained, and the result of the experiment was also proved. This means that when the burner case 11 and the secondary air port 17 are joined by welding or the like, the lower surfaces are flush with each other, and the workability of welding is improved.

[0014]

As described above, according to the petroleum combustion apparatus of the present invention, one side end portion of the secondary air port for promoting mixing to the combustion flame is extended from the end portion of the burner head to outside the burner case. Since the secondary suction port is provided in the blower duct at this side end, the flow velocity in the vicinity of the secondary suction port is high, and the region that becomes a vortex region and the pressure becomes negative pressure is moved outside the burner case. Since it projects, it is provided inside the burner case. 2
The pressure from the secondary air ejection hole can be made a stable positive pressure, and the secondary air flow can be uniformly blown without a negative pressure region throughout the entire longitudinal direction, promoting uniform mixing with the combustion flame. Therefore, good combustion can be obtained without generation of carbon monoxide or soot.

Furthermore, the combustion flame seen due to insufficient mixing of the secondary air does not stick to the burner head, the red heat of the burner head can be prevented, thermal deterioration can be prevented, and high temperature part of unburned gas at the time of combustion stop. It is also possible to suppress the generation of irritating odors such as aldehydes generated by touching.

[Brief description of drawings]

FIG. 1 is a plan sectional view of an essential part of an oil combustion apparatus according to an embodiment of the present invention.

FIG. 2 is a front sectional view of the main part of the petroleum combustion device.

FIG. 3 is a perspective view of a main part of the burner case, the burner head, and a secondary air port.

FIG. 4 is a perspective view of a main part of the burner head and a secondary air port.

FIG. 5 is a perspective view of a main part of a secondary air port according to another embodiment of the present invention.

FIG. 6 is a plan sectional view of a main part of a conventional oil combustion apparatus.

FIG. 7 is a front sectional view of a main part of the petroleum combustion device.

FIG. 8 is a perspective view of essential parts of a burner case, a burner head, and a secondary air port of the oil combustion device.

FIG. 9 is a perspective view of the main part of the burner head, the secondary air port, and the burner head.

[Explanation of symbols]

 1 Nozzle 3 Heater 4 Vaporizer 7 Primary Air Inlet 10 Mixing Chamber 11 Burner Case 12 Flame Hole 13 Inlet 14 Burner Case 15 Secondary Air Outlet 16 Secondary Inlet 17 Secondary Air Port 19 Blower Case 20 Blower Road 21 blower

Claims (1)

[Claims] 1. A burner case formed in a frame shape, and a plurality of inverted U-shaped burner heads which are installed in the burner case and whose upper surface has a flame hole portion and whose lower surface is opened as an intake port.
The burner heads are alternately arranged so as to sandwich the burner head, have a secondary air ejection hole on the upper surface, and one side end portion is extended beyond the end portion of the burner head so as to project outside the burner case. A plurality of rectangular tube-shaped secondary air ports provided with secondary inlets at the side ends thereof, a primary air inlet, a combustion injection nozzle, a vaporizer having an embedded heater, and an inlet of the burner head. And a bottomed box-shaped mixing chamber for communicating the lower end of the vaporizer with the burner case, and an oil combustion apparatus having a blower case connected to a blower at one end forming a blower path between the burner case and the burner case.