JPH04327703A - Petroleum combustion device - Google Patents

Abstract

PURPOSE:To eliminate the exhaust of unburned gas and the generation of white smoke and irritating odor by removing the recondensation of the premixture gas in the supply channel from a vaporizor to a burner. CONSTITUTION:It is possible to eliminate the recondensation of the premixture gas in the burner heads 2 by fixing the suction ports 3 of a plurality of cylindrical burner heads 2 on to the side face of a vaporizor 7 so as to provide thermal conduction among them, providing secondary air ports 5 in the shape of inverted U letter among the burner heads 2 to form a blast channel 18 of primary air between a blower 16 and primary air intake port 8 of a vaporizor 7 and a blast channel 19 of the secondary air between the blower 16 and the open sections 5a of the secondary air port, and directly supplying premixture gas to the burner heads 2 that are heated during the preheating of the vaporizor 7.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an oil combustion device that is used in water heaters and space heating equipment that use petroleum as fuel, and which prevents recondensation of vaporized gas in a vaporized gas supply path.

0002

2. Description of the Related Art The structure of a conventional oil combustion apparatus of this type will be explained with reference to FIGS. 5 and 6.

As shown in the figure, a frame-shaped case 31 is provided with a planar burner head 33 provided with a burner port 32, and one side 34 is fixed to the side of a vaporizer 35. A primary air intake port 36 and a fuel injection nozzle 37 facing the primary air intake port 36 are arranged on one side of the carburetor 35, and a heater 38 is embedded in the other side. A vaporized gas supply port 40 for feeding vaporized gas to the mixing chamber 41 is provided on the lower surface. Burner head 33 and vaporized gas supply port 40
is covered from below with a cover 42 forming a mixing chamber 41;
The vaporized gas vaporized in the vaporization chamber 43 is supplied to the vaporized gas supply port 4.
0, and is sent to the burner head 33 via the mixing chamber 41. 44 is a pump that pumps fuel to the fuel injection nozzle 37, 45 is a blower that sends primary air to the primary air intake port, 46 is a temperature detector that detects the temperature of the carburetor 35 and controls the heater 38, and 47 is an igniter. It is.

In the above configuration, when the heater 38 is energized and the temperature detector 46 detects that the temperature of the vaporizer 35 has reached a predetermined temperature, fuel is injected from the fuel injection nozzle 37 into the vaporization chamber 43 and the vaporized gas is becomes. At the same time, the blower 45 is also operated, and primary air is sent from the primary air intake port 36 to the vaporization chamber 43. As a result, the vaporized gas is mixed with the primary air to become a premixed gas, which enters the mixing chamber 41 through the vaporized gas supply port 40 and is ejected from the flame port 32 of the burner head 33 with uniform airflow distribution. Then, it is ignited by the igniter 47 and combusts.

[0005]

[Problems to be Solved by the Invention] In an oil combustion apparatus having such a conventional configuration, it is necessary to increase the planar area and volume of the mixing chamber 41 in order to uniformly distribute the airflow of the premixed gas to the burner head 33. Ta. Therefore, the distance that the premixed gas flows from the vaporization chamber 43 to the burner head 33 is long.

[0006] Also, the burner head 33 is heated so that the burner head 33 and the mixing chamber 41 are also heated during preheating of the vaporizer 35.
3 and the mixing chamber 41 are thermally connected to the vaporizer 35, but as mentioned above, their planar area and volume are large, so
At the time when preheating of the vaporizer 35 was completed, the temperature did not reach a sufficient temperature, for example, 150° C. or higher.

[0007] Combustion starts in this state, but
The temperature of the burner head 33 and the mixing chamber 41 has only risen to below about 150°C, which is the upper limit temperature at which the premixed gas recondenses, and since the premixed gas flows over a long distance, it is mixed with the burner head 33. The premixed gas in contact with the wall surface of the chamber 41 is recondensed, and fuel accumulates in the mixing chamber 41 as unburned fuel.

[0008] When unburned fuel accumulates in the mixing chamber 41 in this way, it is absorbed by the heat transmitted to the mixing chamber 41 during preheating of the carburetor 35 and the radiant heat radiated from the burner head 33 when the fire is extinguished after being burned for a short time. The temperature of the mixing chamber 41 rises, unburned fuel evaporates and is discharged as natural gas, white smoke is generated, and a pungent odor is generated, which is a problem for an oil combustion device. There was a problem with becoming.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an oil combustion apparatus that eliminates recondensation of premixed gas.

0010

[Means for Solving the Problems] In order to achieve the above object, the present invention includes a burner case and a burner case which is provided with an inlet at one side end and a flame outlet at the upper surface. a plurality of cylindrical burner heads, and an inverted U-shaped secondary air port disposed between the burner heads and having a secondary air outlet on the upper surface and an open portion on the lower surface; a carburetor having a primary air intake, a fuel injection nozzle facing the primary air intake, and an embedded heater; and a blower for supplying primary air and secondary air; The side of the vessel communicates with the vaporization chamber and is thermally connected to the vaporization chamber, and the primary air passage is connected between the primary air intake of the vaporization chamber and the blower, and the air passage between the opening of the secondary air port and the The secondary air blowing passages are arranged between the blowers.

[0011]

[Operation] As described above, the present invention allows the inlet of the burner head to communicate with the vaporizing chamber from the side of the vaporizer and is thermally connected, and the primary air is connected between the primary air inlet of the vaporizer and the blower. By arranging a secondary air ventilation path between the open lower surface of the secondary air port and the blower, a mixing chamber is no longer required, and the components that are heated during preheating of the vaporizer are eliminated. Since this is only the burner head, the temperature rise rate of the burner head can be increased. Furthermore, since the premixed gas is directly supplied from the vaporizer to the burner head, a temperature drop in the premixed gas can be eliminated.

[0012] This makes it possible to eliminate dew condensation of the premixed gas within the burner head.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

As shown in the figure, a plurality of prismatic burner heads 2, 2, . . . are housed at intervals in a frame-shaped case 1. The burner head 2 is provided with an inlet 3 for sucking the premixed gas at one side end, and a flame port 4 on the upper surface. Burner head 2, 2,...
Between them are secondary air pumps 5, 5, which are formed in an inverted U shape.
...is arranged. The secondary air port 5 is provided with a secondary air outlet 6 on its upper surface, and has a bottomless open portion 5a on its lower surface.

[0015] The carburetor 7 is provided with a primary air intake port 8 for taking in primary air at the upper part of one side, and a fuel injection nozzle 9 faces the vaporization chamber 10 from the primary air intake port 8 . Further, a plurality of open portions 11, 11 to which the suction ports 3 of the burner head 2 are individually connected and fixed in a thermally conductive manner are provided at the lower part of the other side surface.
,... are provided, and a heater 12 is buried above them. Furthermore, fins 14 are formed on its outer surface to absorb heat of the combustion flame 13 and heat the carburetor 7. Also,
A frame-shaped case 1 is thermally fixed to a flange 7a of the vaporizer 7 through the flange 1a. 15 is a pump that supplies fuel to the fuel injection pump 9.

The blower 16 supplies primary air to the primary air intake port 8 of the carburetor 7 and secondary air to the opening 5a of the secondary air port 5, respectively.

The box-shaped outer case 17 encloses the frame-shaped case 1 and the vaporizer 7 and forms a sealed space therebetween, and the sealed space is used for primary air and secondary air supplied from the blower 16. It serves as a ventilation path.

This primary air blowing passage 18 is formed between one side of the carburetor 7 and the side of the outer case 17, and communicates the blower 16 with the primary air intake port 8 of the carburetor 7. . Further, the secondary air blowing path 19 is formed between the open part 5a of the secondary air port 5 and the bottom surface of the outer case 17,
The blower 16 and the open portion 5a of the secondary air port 5 are communicated with each other.

The air supplied from the blower 16 is divided into primary air and secondary air by the primary air blowing path 18 and the secondary air blowing path 19.

Note that 20 is a temperature detector that detects the temperature of the vaporizer 7 and controls the heater 12, and 21 is an igniter.

In the above configuration, when the heater 12 is energized and the temperature detector 20 detects that the temperature of the vaporizer 7 has reached a predetermined temperature, the fuel is injected from the fuel injection nozzle 9 into the vaporization chamber 10 and vaporized. It becomes gas. At the same time, blower 1
6 is also operated, and primary air is sent from the primary air intake port 8 to the vaporization chamber 10 via the primary air blowing path 18. As a result, the vaporized gas is mixed with the primary air to become a premixed gas,
It is directly supplied to the burner head 2 from the inlet 3 of the burner head 2, which is connected to the openings 11, 11, . . . of the vaporizer 7. The premixed gas is then transferred to the flame port 4 of the burner head 2.
The fuel is ejected from the igniter 21 and ignited to burn. In this combustion, secondary air is sent from the blower 16 to the opening 5a on the lower surface of the secondary air port 5 through the secondary air blowing path 19, and is ejected from the secondary air outlet 6 to generate the premixed gas. Secondary combustion.

In this operation, the burner head 2 is also heated while the vaporizer 7 is being preheated by the heater 12.
Since the mixing chamber shown in the conventional example is not provided, the heat from the vaporizer 7 is applied only to the burner head 2, and the temperature rise of the burner head 2 is thereby reduced. When preheating of the vaporizer 7 is completed, the premixed gas is heated to about 150°C or higher, which is the upper limit temperature at which it recondenses, so recondensation of the premixed gas in the burner head 2 can be eliminated. .

Furthermore, since the premixed gas is directly supplied from the vaporization chamber 10 to the burner head 2, the distance through which the premixed gas flows is shortened, and the temperature drop of the premixed gas can be eliminated, and the temperature inside the burner head is reduced. This can prevent recondensation of the premixed gas.

Furthermore, in order to directly supply the premixed gas from the vaporization chamber 10 to the burner head 2, the air blowing from the blower 16 is branched into a primary air blowing path 18 and a secondary air blowing path 19, which is different from the conventional example. This eliminates the need for the mixing chamber shown in Figure 3. This eliminates the need for the amount of heat consumed by the mixing chamber during preheating of the vaporizer 7, and also shortens the flow distance of the premixed gas. It is possible to prevent recondensation of the premixed gas within 2.

[0025]

As is clear from the above description of the embodiments, according to the present invention, the suction port of the burner head is communicated with the vaporization chamber from the side of the vaporizer and is thermally connected to the vaporization chamber. A mixing chamber is not required because a primary air passage is provided between the primary air intake and the blower, and a secondary air passage is provided between the open bottom of the secondary air port and the blower. Since the burner head is the only member heated during preheating of the vaporizer, the rate of temperature rise of the burner head can be increased. Furthermore, since the premixed gas is directly supplied from the vaporizer to the burner head, a temperature drop in the premixed gas can be eliminated.

[0026] This eliminates dew condensation of the premixed gas in the burner head, which prevents unburned fuel from evaporating and being discharged as natural gas, white smoke, and pungent odors. It is possible to provide an oil combustion device that does not generate oil.

[Brief explanation of drawings]

FIG. 1: Side sectional view of an oil combustion device according to an embodiment of the present invention.

[
Figure 2: Plan view

[Figure 3] Exploded perspective view of the main parts

[Fig. 4] A perspective view showing the configuration of the burner head and secondary air port.

[Figure 5] Side sectional view of a conventional oil combustion device

[Figure 6] Plan view

[Explanation of symbols]

1 Burner case 2 Burner head 3 Inlet 4 Flame mouth part 5 Secondary air port 5a Open part 6 Secondary air outlet 7. Vaporizer 8 Primary air intake 9 Fuel injection nozzle 12 Heater 16　Blower 18 Primary air ventilation path 19 Secondary air ventilation path

Claims (1)

[Claims] 1. A burner case, a plurality of cylindrical burner heads housed in the burner case, each having a suction port at one side end and a flame port at an upper surface; an inverted U-shaped secondary air port with a secondary air outlet provided on the upper surface and an open portion on the lower surface; a primary air intake port; and a fuel injection nozzle facing the primary air intake port. and a blower for supplying primary air and secondary air, the inlet of the burner head is communicated with the vaporization chamber from the side of the vaporizer and is thermally connected to the vaporizer. A blast path for the primary air is provided between the primary air intake port of the vaporization chamber and the blower, and a blow path for the secondary air is provided between the opening of the secondary air port and the blower. Oil combustion equipment installed.