JPS5926202B2 - liquid fuel combustion equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a liquid fuel combustion device, and is used in a device that generates a relatively small amount of heat, such as an oil stove or oil stove, by atomizing liquid fuel and storing it in a vaporization chamber together with air. The purpose of the present invention is to provide a vaporization premixing bath in which a vaporized fuel mixture is generated by contacting with a high temperature part of a vaporization chamber, and is combusted at the flame opening of a burner.

The above-mentioned means for generating atomized fuel include means for injecting atomized petroleum particles from a spray nozzle using air injection, and means for flowing fuel down onto a high-speed rotating plate and injecting atomized particles by centrifugal force. These are both vaporization premixing systems, in which the fuel components in the mixture ejected from the flame port are completely vaporized, and an air-fuel ratio suitable for combustion is maintained.
It is capable of stably sustaining complete combustion of blue flame.

However, since the contact area of the vaporization chamber where the injected atomized fuel hits is concentrated in a range, even if the temperature of that area decreases, the temperature recovery due to heat transfer from the surroundings is delayed, resulting in delayed vaporization and oil stagnation. This may impede ignitability, or when the combustion amount is changed, the air-fuel ratio may be disturbed, causing flame instability.

This invention improves the above-mentioned drawbacks by forming a vaporization column inside the vaporization chamber.Examples of this invention will be described below with reference to the drawings.

Fig. 1 is a vertical cross-sectional view of the burner, and Fig. 2 is a cross-sectional view of the burner. 1 is a burner body, which forms a burner port I with a burner cap 6 mounted on the upper part, and a mixing partition disposed inside. The plate 5 forms an upper air-fuel mixture chamber and a lower vaporization chamber.

Reference numeral 3 designates a plurality of conical vaporization columns formed at the bottom of the vaporization chamber, and is provided in front of the inner wall of the vaporization chamber 3, where the injected atomized particles hit.

Reference numeral 2 denotes a vaporization heater disposed on the lower surface thereof, which uses a positive characteristic semiconductor heater.

2a is the insulating porcelain.

Reference numeral 4 designates an atomized fuel inlet that protrudes and opens from the side of the vaporization chamber.

FIG. 3 shows an embodiment in which this burner is combined with an atomized fuel generator using centrifugal force, in which a rotating plate 22, a fan impeller 23, and a pump impeller 24 are all attached to a rotating shaft 21 and driven by a motor 20. Ru.

From the leveler 32 to the sub tank 2 through the oil pipe 31
The fuel oil supplied to 7 always maintains its fixed position.

Fuel oil discharged from the pump case 28 due to the rotation of the pump impeller 24 flows down to the upper center surface of the rotary plate 22 through the oil supply pipe 29.

The air sucked from the air suction port 25 of the lower cylinder 19 by the rotation of the fan impeller 23 is discharged from the upper part of the fan case 18 and supplied to the atomization container 10, and the atomization container 10 opens its side and atomizes it. A fuel outlet 11 is connected to the atomized fuel outlet 4 of the vaporization chamber with a heat insulating material 9 in between.

A rotatable damper 12 is inscribed in the atomization container 10 and adjusts the opening degree of the atomization fuel outlet 11.

30 is a drain pipe that communicates the atomization container 10 and the sub-tank 27.

FIG. 4 is a cross-sectional view showing a state in which a portion of the atomized fuel passes through the opening of the damper and is injected into the vaporization chamber.

The operation of this embodiment constructed as described above will now be described. First, when the vaporization heater 2 is energized, the burner body is heated from the bottom of the vaporization chamber, and heat is sequentially transferred upward.

Since the vaporization heater has self-temperature control, it maintains a constant temperature of about 260°C, and the upper part of the burner body also reaches a temperature close to this.

The above preheating time is about 5 minutes, and when the motor 20 is energized when this preheating is completed, the rotating plate 22, fan impeller 23, and pump impeller 24 rotate, and the fuel oil flowing down onto the upper surface of the rotating plate is centrifuged. Due to the force, atomized particles are ejected from the entire periphery of the rotating plate, but most of them are ejected from the damper 12.
The remaining atomized fuel, which hits the damper and drips downward, flows back into the sub-tank 27 through the drain pipe 30, and passes through the opening of the damper, and is injected into the vaporization chamber of the burner.

At the same time, the air supplied to the atomization container 10 by the rotation of the fine impeller 23 also passes through the opening of the damper 12 and is sent to the vaporization chamber.

A part of the atomized fuel injected into the vaporization chamber directly hits the inner wall of the vaporization chamber, and the rest hits the vaporization column 3, and a part of it is diffusely reflected and hits other high-temperature walls, so that the entire amount quickly completes vaporization. do.

In the above vaporization process, the parts where the atomized fuel receives contact heat are:
The heat is spread over a wide area without being concentrated in one part, and the vaporization column 3 is located close to the vaporization heater 2, providing good heat transfer conditions, which prevents a temperature drop due to vaporization and effectively completes vaporization immediately.

Therefore, problems such as delayed vaporization and oil puddles do not occur.

The vaporized fuel and air pass through the mixing partition plate 5 and are ejected from the flame lower, but since both are evenly mixed and heated, combustion begins immediately when ignited.

When the opening degree of the damper 12 is changed, the amount of atomized fuel injected into the vaporization chamber changes, and at the same time, the amount of air delivered also changes, so it is possible to adjust the amount of N combustion while always maintaining the air-fuel ratio constant. This allows for stable and continuous complete combustion at all times.

To temporarily stop combustion, when the motor 20 is de-energized, the supply of fuel and air is cut off and combustion stops, and only the vaporization heater 2 continues to be energized, so the preheating state of the burner is maintained.
In the re-ignition, the motor 20 is restarted, and combustion starts immediately in the same way as in the initial ignition.

It is obvious from the above description that in order to completely stop combustion, it is sufficient to cut off the power supply to the motor 20 and the vaporization heater 2.

In the present invention, a conical vaporization column is provided in front of the inner wall of the vaporization chamber where the atomized fuel injected from the atomized fuel generator hits, and a part of the atomized fuel hits the vaporization column and is diffusely reflected and vaporized. Since it spreads over the inner wall of the chamber, a part of the atomized fuel concentrates on a part of the inner wall of the vaporization chamber, unlike conventional methods, and there is no delay in vaporization or oil pools, and it vaporizes smoothly, improving ignitability and combustion. In particular, in the present invention, since the vaporizing column is conical, the atomized particles that hit the column are reflected in a variety of directions compared to a simple cylindrical column. The spread toward the inner wall is wide, and as a result, the vaporization characteristics are excellent, and the above-mentioned ignitability and combustibility are extremely good.

[Brief explanation of drawings]

FIG. 1 is a novel cross-sectional view of a liquid fuel combustion device according to an embodiment of the present invention, FIG. 2 is a cross-sectional view of the same, and FIG. 3 is a vertical cross-sectional view of the device combined with a centrifugal atomization fuel device. FIG. 4 is a cross-sectional view of the atomization container and vaporization chamber. 1... burner body, 2... vaporization heater,
2a... Insulated porcelain, 3... Vaporization column, 4.
...Atomized fuel inlet, 5...Mixing partition plate,
6...burner cap, 7...flame mouth,
9...Insulating material, 10...Atomization container, 1
1... Atomized fuel outlet, 12... Damper, 18... Fan case, 19...
Lower tube, 20... Motor 21... Rotating shaft, 22... Rotating plate, 23... Fan impeller, 24... Ponfin impeller, 25...
...Air inlet, 27...Sub tank, 2
8... Pump case, 29... Oil supply pipe, 30... Drain pipe, 31...
・Oil pipe, 32...Leveler.

Claims (1)

[Claims] 1. An atomized fuel generator that injects atomized liquid fuel;
The atomized fuel injected from the atomized fuel generator includes a vaporization chamber having an inner wall in which the atomized fuel is worm-like, and a vaporization column provided inside the vaporization chamber and on which the atomized fuel hits before hitting the inner wall, the vaporization column being A cone-shaped liquid fuel combustion device. 2 Claim 1 in which a heating element is arranged at the bottom of the vaporization column
The liquid fuel combustion device described in .