JPS59142309A - Liquid fuel burner - Google Patents

Abstract

PURPOSE:To prevent re-condensation of an evaporated gas at the burner part at the time of ignition using only an electric heater and utilize the combustion gas absorbed by the burner at the time of continuous combustion for evaporating heat to greatly reduce the quantity of power consumed, by efficiently carrying out a heat transfer between the evaporator and the burner. CONSTITUTION:In the titled liquid fuel evaporating burner, a heat transfer property between the evaporator 1 and the burner 12 is adjusted by inclusions such as a heat insulator 17 and the like. A temperature gradient coincident with the operational state of the liquid fuel burner is generated between the evaporator 1 and the burner 12. Since the temperature gradient coincident with the operational state is generated, a part of heat generated by the electric heater 2 moves from the evaporator 1 to the burner at the time of preheating within the burner, and the combustion heat absorbed by the burner can be moved to the evaporator 1 at the time of continuous combustion.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to a liquid fuel combustion device, and in particular, to prevent recondensation of vaporized fuel in a part of a burner during ignition, and to convert combustion heat into vaporization heat during continuous combustion. This relates to improvements to combustion equipment that can be reused.

[Prior art]

FIG. 1 is a diagram showing a vaporization type combustion apparatus disclosed in, for example, Japanese Utility Model Application Publication No. 55-162724. (1) is a burner, (2) is a carburetor, and Figure 2 is a cross-sectional view of the carburetor.
(2) is an electric heater, (4) is a vaporization chamber, (1) is an outer wall cylinder, (3) is an inner wall cylinder, and (7) is a fuel oil pipe.

A conventional vaporization combustion device is configured as described above. Taking kerosene as an example of liquid fuel, kerosene is first injected into the vaporizer (1) which has been heated to around 250°C by the electric heater (2), and then the burner +12 is heated.
It burns by blowing air into it.

In conventional heating vaporization type oil combustion devices, the vaporizer and burner are separated, so that heat exchange between the vaporizer and a portion of the burner is completely blocked. There were two problems due to the lack of heat exchange between the vaporizer and part of the burner.

(1) At the time of ignition, the temperature of a part of the burner was low, so the vaporized gas sent from the vaporizer was re-condensed within the burner, causing ignition failure.

(2) During continuous combustion, it is impossible to conduct the combustion heat to the vaporization chamber via the burner, and the amount of heat required to vaporize the liquid fuel has the disadvantage of having to rely solely on the electric heater. there were.

[Summary of the invention]

This invention was made for the purpose of improving such drawbacks, and by using a medium having a specific thermal conductivity, the vaporized gas in a part of the burner at the time of ignition can be reduced by using only an electric heater attached to the vaporizer side. Furthermore, during continuous combustion, it is possible to conduct the combustion heat absorbed by a part of the burner to the vaporizer side, greatly increasing the energization rate of the electric heater during vaporization on the vaporizer side. The present invention provides a liquid fuel combustion device that can reduce fuel consumption.

[Embodiments of the invention]

FIG. 3 is a cross-sectional view showing one embodiment of the present invention, (1
) is a vaporizer with an electric heater (2) embedded in the bottom and a heating plate (3) on the top of the electric heater (2).
), the upper part is formed into a vaporization chamber (4), and a gas discharge port (5) is opened. (6) is a heating plate temperature adjustment sensor, which is embedded in the heating plate (3). (7) is a fuel oil supply pipe, with a fuel dripping nozzle (8) at the tip of the blade passing through the vaporizer (1) and extending above the heating plate (3) in the vaporization chamber (4). The other end provided with the pump (9) is immersed into liquid fuel←D in the tank Qα. +121 is a part of the burner, which forms the mixing chamber a and the combustion section I, and the above-mentioned carburetor (
An opening +151 communicating with the gas discharge port (5) of No. 11 is provided.

In addition, an air supply port ++ [9] is provided on the upper side. αη
is a heating medium made of an asbestos sheet or the like, and is interposed in close contact with the joint surface of the vaporizer (1) and the burner part α2.

Next, a detailed explanation of the operation of the embodiment will be given. Referring to FIGS. 3 and 4, the details of the operation will be explained using kerosene as an example of the liquid fuel. First, the amount of space inside the vaporization chamber (4).

To raise the temperature of the heating plate (3), which is a kerosene heating and vaporizing surface, to a temperature (approximately 250°C or higher) that allows kerosene to be vaporized.

Electrify the electric heater (2) and start heating. By passing through the electric heater (2), the heating plate (3),
Not only the temperature but also the entire vaporizer 0) rises in temperature. As the temperature of the vaporizer (1) increases, the temperature of the burner part α2 increases via a heat medium an, for example, an asbestos plate. At the time t1 when the temperature a of the burner part az reaches a temperature (approximately 60°C or higher) that does not cause recondensation of vaporized gas, the heating plate temperature adjustment sensor (6) part detects the heating plate (3) set temperature ( Approximately 2
50℃ or higher). At this time t1, kerosene is dripped onto the heating plate (31) from the fuel dripping nozzle (8) through the fuel feed pipe (7) from the pump 0IIK and vaporized, and the vaporized gas is sent to the burner negative Z for ignition combustion. When combustion occurs, part of the burner (12 is
The combustion heat is absorbed, and eventually the vaporizer (11 side temperature (approximately 2
50°C), further pressure, or higher. Burner part Q21. From the point when the temperature a reaches the same level as or higher than the temperature on the side of the vaporizer (1), the heat is conducted from the burner part Q3 to the side of the vaporizer (11), and the energization rate C of the electric heater (2) increases.
As shown in Figure 4, it decreases dramatically.

That is, the present invention is a liquid fuel vaporization and combustion device in which the thermal conductivity between the vaporizer (1) side and the burner α2 side is adjusted by an inclusion such as a heat insulating material 07). It is designed to generate a temperature gradient between the (1) side and the burner (12 side) that matches the operating state of the liquid fuel combustion device.

Due to the generation of a temperature gradient that matches the operating conditions, in the combustion device, during preheating, the vaporizer (11 (Rli
As a result, part of the heat generated by the electric heater (2) is transferred to the combustor side, and during continuous combustion, it is possible to transfer the combustion heat absorbed by the burner to the vaporizer (1) side.

As shown above, inside the liquid fuel combustion device.

During the process from preheating to continuous combustion, the vaporizer (1
By efficiently transferring heat between 1 and the burner z, the electric heater (2) loaded on the vaporizer (1) side
This prevents the re-condensation of the vaporized gas in the burner part (12) during ignition.Furthermore, during continuous combustion, the combustion gas absorbed by the burner is conducted to the vaporizer (1) side, and the heat for vaporization is Electric heater for vaporization (2)
The present invention provides a liquid fuel combustion device that can significantly reduce electricity consumption.

[Description of other embodiments]

In the above embodiment, 9
Although the heat conduction was adjusted through the asbestos sheet, the same effect can be obtained by using ceramic plates, fiber aggregates, metals, etc. other than the asbestos sheet.

Further, the same effect can be obtained by adjusting the contact area between a part of the burner and the vaporizer part without using means involving different materials.

[Use for other purposes]

Incidentally, in the above explanation, the present invention was described only with respect to the combustion of kerosene, but it goes without saying that it can be used with other liquid fuels as well.

〔Effect of the invention〕

As described above, this invention uses a single electric heater to prevent vaporization of liquid fuel and re-condensation in the burner during ignition, and also to reduce combustion heat during continuous combustion. , heat is transferred from a part of the burner to the vaporizer side, and the energization rate of the electric heater is reduced by 1.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing a conventional liquid fuel combustion device. FIG. 2 is a cross-sectional view showing the main part of FIG. 1, FIG. 3 is a cross-sectional view showing an embodiment of the present invention, and FIG. 4 is an explanatory diagram of the operation according to the present invention. In addition, (1) is a vaporization chamber, (2) is an electric heater, and (3)
is a heating plate, (4) is a vaporization chamber, α2 is a part of a burner, and aη is a heat medium. The same reference numerals in the figures indicate the same or corresponding parts. Agent Shin Tameno

Claims (3)

[Claims] (1) In a combustion device in which liquid fuel is injected dropwise onto a metal plate heated using heat from an electric heater, etc., and vaporized and combusted, the thermal conductivity between the vaporization chamber and part of the burner is Adjusted liquid fuel combustion device. (2) During the time it takes for the heated metal plate temperature to reach the heating set temperature, the temperature of some of the adjacent burners rises. 2. The liquid fuel combustion apparatus according to claim 1, wherein heat transfer from the vaporization chamber to a portion of the burner is adjusted so that the temperature rises to a level that does not cause recondensation of the vaporized liquid fuel. (3) Claim 1 characterized in that a structure or material having a thermal conductivity lower than that of the materials constituting both is interposed between the vaporizer part and a part of the burner. The liquid fuel combustion device according to Items 1 and 2.