JPH018822Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a liquid fuel combustion device, and more specifically, to a burner section of a preheating ignition type liquid fuel combustion device used in home oil heaters, etc. It is about improvement.

[Prior Art] Most liquid fuel combustion devices of this type have a cylindrical burner body that forms a vaporization chamber, and an electric heater for preheating is arranged around the burner body. The burner body is heated with an electric heater to gasify and ignite the liquid fuel scattered by the rotor, and after transition to steady combustion, the burner body is maintained at a high temperature by receiving heat back from the combustion flame. . In that case, conventionally, the part that receives the heat bag, the part that is heated by the electric heater, and the part that becomes the oil reservoir at the bottom are all integrally molded by casting, so the heat capacity and heat dissipation area are large. It took about 4 to 5 minutes to preheat the burner body to a predetermined temperature.

[Purpose of the invention] Therefore, the purpose of this invention is to provide a liquid that has a burner body that can significantly shorten the time required for preheating, and a rotor that is suitable for the burner body and that can be assembled with high precision. An object of the present invention is to provide a fuel combustion device.

[Embodiments] This invention will be described below with reference to embodiments shown in the accompanying drawings.

As shown in FIG. 1, this liquid fuel combustion device has a rotating shaft 1 that extends substantially vertically and is rotated by a motor (not shown).
is provided with a rotor 2. Reference numeral 3 is a casing that guides air from a blower fan (not shown) toward the rotor 2, and a cylindrical burner body 4 that forms a vaporization chamber inside is mounted on the upper part of the casing 3 with a heat insulating material. It is installed via 5.

The burner body 4 is composed of an upper burner cylinder 7 and a lower burner cylinder 8 made of cast metal, which are vertically combined coaxially with a spacer 6 made of a material with low thermal conductivity, such as ceramic or stainless steel. An electric heater 9 for preheating is provided around the lower burner cylinder 8. On the other hand, a burner head 10 having a plurality of flame holes 11 is provided at the upper part of the upper burner cylinder 7. Incidentally, at the lower end of the upper burner cylinder 7, an eaves plate 12 is provided which projects in a funnel shape so as to have a gentle downward slope in the direction of the rotating shaft 1.

The rotor 2 includes a hollow cup cone 13 formed in an approximately mortar shape, that is, an inverted truncated cone shape, and a fuel supply pipe 1 is inserted into the cup cone 13.
Liquid fuel is supplied from 6.
In this embodiment, the cup cone 13 is attached to the lower surface of a disk 14 fixed to the rotating shaft 1 via a plurality of spacer plates 15. As clearly shown in FIG. 2, a first rotary plate 17 is provided at the upper edge of the cup cone 13 to scatter the liquid fuel supplied from the fuel supply pipe 16 toward the inner wall surface of the upper burner cylinder 7. A working flange is provided in series. Further, on the body of the cup cone 13, a vertical wall portion 18 parallel to the rotation axis 1 is provided.
A second rotary plate 19 is welded and fixed to this vertical wall portion 18 to scatter the liquid fuel dripping along the wall surface of the burner tube 7 toward the inner wall surface of the lower burner tube 8. has been done. In addition,
According to this embodiment, vanes 20 are provided around the first rotary plate 17 to rotate with the rotary shaft 1 and scatter the liquid fuel scattered from the rotary plate 17 over a wider range. There is.

In the above-described configuration, when a combustion switch (not shown) is turned on, the electric heater 9 is first energized and the lower burner cylinder 8 is heated. This lower burner cylinder 8 has a predetermined temperature (preferably 270°C to 280°C).
When heated to a temperature of 100.degree. C., a motor (not shown) is activated and the rotating shaft 1 rotates. Further, a blower fan (not shown) is operated to send air into the vaporization chamber, and liquid fuel is sent into the cup cone 13 via the fuel supply pipe 16, and the liquid fuel is transferred to the first rotary plate 17 by centrifugal force. It is sprayed in the form of a mist toward the inner wall surface of the upper burner cylinder 7. In this state, the upper burner cylinder 7 is not heated, so the sprayed liquid fuel passes through the eaves plate 12 without being vaporized and drips onto the second rotating plate 19. It is blown onto the lower burner cylinder 8 and vaporized. Then, the vaporized fuel is mixed with air sent in from below to form a mixture gas, which is ejected from the flame hole 11 of the burner head 10 and ignited by a spark plug (not shown). In this way, when combustion begins, the upper burner cylinder 7 receives heat back from the combustion flame and is gradually heated, and when the temperature is raised sufficiently, the liquid fuel scattered from the first rotary plate 17 is heated. Since the gas is almost completely vaporized on the inner wall surface of the upper burner cylinder 7, the electric heater 9 is turned off.

[Effects] As is clear from the description of the embodiments described above, according to this invention, the lower burner cylinder 8 is heated by the electric heater 9 when the burner body 4 is started, and the upper burner cylinder is heated by the heat bag during steady combustion. 7
By dividing it into two parts and interposing a spacer 6 of low thermal conductivity made of ceramic or the like between them, the preheating time by the electric heater 9 can be significantly shortened to about 1 to 2 minutes. At the same time, the burner body 4 itself can be made smaller. Note that temperature sensors such as thermistors are installed in both the lower burner cylinder 8 and the upper burner cylinder 7, and if the temperature of either of them is higher than the fuel vaporization temperature (270°C to 280°C), the device will start operating or Continue operation, and at the same time turn on the electric heater 9.
ON-OFF control allows more detailed power saving. In addition, since the eaves plate 12 is provided at the lower end of the upper burner cylinder 7, during steady combustion, heavy components contained in the fuel or oil droplets that collide with the vaporizing surface are not vaporized. Even if the unforeseen substances rebound due to the condition, there is no risk of those unforeseen substances falling directly off the second rotary plate 19. On the other hand, a vertical wall portion 8 is provided on the body of the cup cone 13, and a second rotary plate 19 is attached to that portion.
By welding to the tapered surface of the cup cone, it is easier to achieve dimensional accuracy during assembly and welding is easier than when welding to the tapered surface of the cup cone.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part showing a first embodiment of this invention, and FIG. 2 is an enlarged sectional view of the rotor shown in FIG. 1. In the figure, 1 is the rotating shaft, 2 is the rotor, 3 is the casing, 4 is the burner body, 6 is the spacer, 7 is the upper burner tube, 8 is the lower burner tube, 9 is the heater, 10 is the burner head, and 12 is the eaves plate. , 16 is a fuel supply pipe, 17 is a first rotating plate, 18 is a vertical wall portion, 1
9 is a second rotating plate.

Claims (1)

[Scope of claims for utility model registration] (1) A cylindrical burner body forming a vaporization chamber inside;
a preheater disposed around the outside of the burner body;
A rotor that is attached to a rotating shaft of a vertically extending motor and rotates within the vaporization chamber, and a fuel supply means for supplying liquid fuel to the oil rotor, the rotor being directed toward the burner body heated by the heater. In the liquid fuel combustion device, the liquid fuel is scattered and vaporized by the rotor, and the vaporized gas is ignited. The rotor is composed of an upper burner cylinder and a lower burner cylinder made of cast metal, and the preheater is disposed around the outside of the lower burner cylinder, and the rotor includes a cup cone formed approximately in the shape of a mortar. , a flange is connected to the upper edge of the cup cone and serves as a first rotary plate for scattering liquid fuel supplied into the cup cone from the fuel supply means toward the upper burner cylinder, and The body of the cup cone is formed with a vertical wall part parallel to the rotation axis, and a second wall part is formed on the vertical wall part to scatter liquid fuel dripping from the upper burner cylinder side toward the lower burner cylinder. A liquid fuel combustion device characterized in that a rotating plate is fixed by welding. (2) Claim (1) of the utility model registration is characterized in that the lower end of the second burner section is connected with an eaves plate that extends in the direction of the rotation axis with a gentle downward slope. liquid fuel combustion equipment. (3) The liquid fuel combustion device according to claim (1), wherein the spacer is made of ceramic or stainless steel.